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12222012212221 = 71746001744603
BaseRepresentation
bin1011000111011010100010…
…1100100100001111111101
31121021102011001020000210011
42301312220230210033331
53100221140111242341
641554414230143221
72401003566460240
oct261665054441775
947242131200704
1012222012212221
1139923652a2929
12145485b1b1b11
136a86b92484b6
143037972dd257
15162dc8ad6b81
hexb1da8b243fd

12222012212221 has 4 divisors (see below), whose sum is σ = 13968013956832. Its totient is φ = 10476010467612.

The previous prime is 12222012212219. The next prime is 12222012212227. The reversal of 12222012212221 is 12221221022221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12222012212221 - 21 = 12222012212219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12222012212192 and 12222012212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222012212227) 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, 873000872295 + ... + 873000872308.

It is an arithmetic number, because the mean of its divisors is an integer number (3492003489208).

Almost surely, 212222012212221 is an apocalyptic number.

It is an amenable number.

12222012212221 is a deficient number, since it is larger than the sum of its proper divisors (1746001744611).

12222012212221 is an equidigital number, since it uses as much as digits as its factorization.

12222012212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746001744610.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 12222012212221 its reverse (12221221022221), we get a palindrome (24443233234442).

The spelling of 12222012212221 in words is "twelve trillion, two hundred twenty-two billion, twelve million, two hundred twelve thousand, two hundred twenty-one".

Divisors: 1 7 1746001744603 12222012212221