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12021110221231 = 39173068958443
BaseRepresentation
bin1010111011101110001000…
…0000010010100110101111
31120120012120211200110021001
42232323202000102212233
53033423213204034411
641322231035221131
72350332213643006
oct256734200224657
946505524613231
1012021110221231
11391514036a531
1214219315a77a7
136927800b6657
142d7b79503c3d
1515ca6b390dc1
hexaeee20129af

12021110221231 has 4 divisors (see below), whose sum is σ = 12024179183592. Its totient is φ = 12018041258872.

The previous prime is 12021110221181. The next prime is 12021110221273. The reversal of 12021110221231 is 13212201112021.

12021110221231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12021110221231 is a prime.

It is a super-2 number, since 2×120211102212312 (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021110221199 and 12021110221208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021110224231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1534475305 + ... + 1534483138.

It is an arithmetic number, because the mean of its divisors is an integer number (3006044795898).

Almost surely, 212021110221231 is an apocalyptic number.

12021110221231 is a deficient number, since it is larger than the sum of its proper divisors (3068962361).

12021110221231 is an equidigital number, since it uses as much as digits as its factorization.

12021110221231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3068962360.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 12021110221231 its reverse (13212201112021), we get a palindrome (25233311333252).

The spelling of 12021110221231 in words is "twelve trillion, twenty-one billion, one hundred ten million, two hundred twenty-one thousand, two hundred thirty-one".

Divisors: 1 3917 3068958443 12021110221231