31200100133100 has 72 divisors (see below), whose sum is σ = 90430385293248. Its totient is φ = 8305455681600.

The previous prime is 31200100133057. The next prime is 31200100133119. The reversal of 31200100133100 is 133100100213.

It is a super-2 number, since 2×31200100133100² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 31200100133100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90897294 + ... + 91239893.

Almost surely, 2^{31200100133100} is an apocalyptic number.

31200100133100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31200100133100 is an abundant number, since it is smaller than the sum of its proper divisors (59230285160148).

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

31200100133100 is a wasteful number, since it uses less digits than its factorization.

31200100133100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182137775 (or 182137768 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31200100133100 its reverse (133100100213), we get a palindrome (31333200233313).

The spelling of 31200100133100 in words is "thirty-one trillion, two hundred billion, one hundred million, one hundred thirty-three thousand, one hundred".