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12213123312221 = 131491196300143
BaseRepresentation
bin1011000110111001011011…
…1000000110101001011101
31121020120012120012010022122
42301232112320012221131
53100044434031442341
641550344214152325
72400240403202006
oct261562670065135
947216176163278
1012213123312221
113989613794787
121452b9a3526a5
136a79007c7160
143031929681ad
15162a5855394b
hexb1b96e06a5d

12213123312221 has 8 divisors (see below), whose sum is σ = 13152684625920. Its totient is φ = 11273574897072.

The previous prime is 12213123312167. The next prime is 12213123312241. The reversal of 12213123312221 is 12221332131221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12213123312221 - 218 = 12213123050077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213123312241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1211525 + ... + 5088618.

It is an arithmetic number, because the mean of its divisors is an integer number (1644085578240).

Almost surely, 212213123312221 is an apocalyptic number.

It is an amenable number.

12213123312221 is a deficient number, since it is larger than the sum of its proper divisors (939561313699).

12213123312221 is a wasteful number, since it uses less digits than its factorization.

12213123312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6449275.

The product of its digits is 1728, while the sum is 26.

Adding to 12213123312221 its reverse (12221332131221), we get a palindrome (24434455443442).

The spelling of 12213123312221 in words is "twelve trillion, two hundred thirteen billion, one hundred twenty-three million, three hundred twelve thousand, two hundred twenty-one".

Divisors: 1 13 149119 1938547 6300143 81901859 939471024017 12213123312221