12131221102 has 64 divisors (see below), whose sum is σ = 24625004544. Its totient is φ = 4328432640.

The previous prime is 12131221073. The next prime is 12131221147. The reversal of 12131221102 is 20112213121.

It is a super-2 number, since 2×12131221102² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 230398 + ... + 278110.

It is an arithmetic number, because the mean of its divisors is an integer number (384765696).

Almost surely, 2^12131221102 is an apocalyptic number.

12131221102 is an abundant number, since it is smaller than the sum of its proper divisors (12493783442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12131221102 is a wasteful number, since it uses less digits than its factorization.

12131221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47873.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12131221102 its reverse (20112213121), we get a palindrome (32243434223).

The spelling of 12131221102 in words is "twelve billion, one hundred thirty-one million, two hundred twenty-one thousand, one hundred two".