31242130120100 has 36 divisors (see below), whose sum is σ = 71363602489200. Its totient is φ = 11839122992160.

The previous prime is 31242130120037. The next prime is 31242130120127. The reversal of 31242130120100 is 102103124213.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 8221611290 + ... + 8221615089.

Almost surely, 2^{31242130120100} is an apocalyptic number.

It is an amenable number.

31242130120100 is an abundant number, since it is smaller than the sum of its proper divisors (40121472369100).

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

31242130120100 is a wasteful number, since it uses less digits than its factorization.

31242130120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16443226412 (or 16443226405 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31242130120100 its reverse (102103124213), we get a palindrome (31344233244313).

The spelling of 31242130120100 in words is "thirty-one trillion, two hundred forty-two billion, one hundred thirty million, one hundred twenty thousand, one hundred".