31212131030100 has 108 divisors (see below), whose sum is σ = 98088129624576. Its totient is φ = 8301503165760.

The previous prime is 31212131030089. The next prime is 31212131030131. The reversal of 31212131030100 is 103013121213.

31212131030100 is a `hidden beast` number, since 31 + 2 + 1 + 21 + 310 + 301 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 44929642 + ... + 45619041.

Almost surely, 2^{31212131030100} is an apocalyptic number.

31212131030100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31212131030100 is an abundant number, since it is smaller than the sum of its proper divisors (66875998594476).

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

31212131030100 is a wasteful number, since it uses less digits than its factorization.

31212131030100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90549086 (or 90549076 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31212131030100 its reverse (103013121213), we get a palindrome (31315144151313).

The spelling of 31212131030100 in words is "thirty-one trillion, two hundred twelve billion, one hundred thirty-one million, thirty thousand, one hundred".