156631123212 has 48 divisors (see below), whose sum is σ = 366793940352. Its totient is φ = 52021756800.

The previous prime is 156631123171. The next prime is 156631123273. The reversal of 156631123212 is 212321136651.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10701043 + ... + 10715669.

It is an arithmetic number, because the mean of its divisors is an integer number (7641540424).

Almost surely, 2^156631123212 is an apocalyptic number.

156631123212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

156631123212 is an abundant number, since it is smaller than the sum of its proper divisors (210162817140).

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

156631123212 is a wasteful number, since it uses less digits than its factorization.

156631123212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17798 (or 17796 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

Adding to 156631123212 its reverse (212321136651), we get a palindrome (368952259863).

The spelling of 156631123212 in words is "one hundred fifty-six billion, six hundred thirty-one million, one hundred twenty-three thousand, two hundred twelve".