31200100013100 has 288 divisors, whose sum is σ = 95666778559296. Its totient is φ = 7840054886400.

The previous prime is 31200100013087. The next prime is 31200100013101. The reversal of 31200100013100 is 131000100213.

It is a super-2 number, since 2×31200100013100² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (31200100013101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 62098494 + ... + 62598906.

It is an arithmetic number, because the mean of its divisors is an integer number (332176314442).

Almost surely, 2^{31200100013100} is an apocalyptic number.

31200100013100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31200100013100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47833389279648).

31200100013100 is an abundant number, since it is smaller than the sum of its proper divisors (64466678546196).

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

31200100013100 is a wasteful number, since it uses less digits than its factorization.

31200100013100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500645 (or 500638 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 31200100013100 its reverse (131000100213), we get a palindrome (31331100113313).

The spelling of 31200100013100 in words is "thirty-one trillion, two hundred billion, one hundred million, thirteen thousand, one hundred".