31230123132 has 36 divisors (see below), whose sum is σ = 78906884280. Its totient is φ = 9609268032.

The previous prime is 31230123049. The next prime is 31230123149. The reversal of 31230123132 is 23132103213.

It is a junction number, because it is equal to n+sod(n) for n = 31230123099 and 31230123108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7697707 + ... + 7701762.

Almost surely, 2^31230123132 is an apocalyptic number.

It is an amenable number.

31230123132 is an abundant number, since it is smaller than the sum of its proper divisors (47676761148).

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

31230123132 is a wasteful number, since it uses less digits than its factorization.

31230123132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15399502 (or 15399487 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31230123132 its reverse (23132103213), we get a palindrome (54362226345).

The spelling of 31230123132 in words is "thirty-one billion, two hundred thirty million, one hundred twenty-three thousand, one hundred thirty-two".