31212103023100 has 18 divisors (see below), whose sum is σ = 67730263560344. Its totient is φ = 12484841209200.

The previous prime is 31212103023097. The next prime is 31212103023137. The reversal of 31212103023100 is 132030121213.

It is a super-2 number, since 2×31212103023100² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 156060515016 + ... + 156060515215.

Almost surely, 2^{31212103023100} is an apocalyptic number.

It is an amenable number.

31212103023100 is an abundant number, since it is smaller than the sum of its proper divisors (36518160537244).

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

31212103023100 is a wasteful number, since it uses less digits than its factorization.

31212103023100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312121030245 (or 312121030238 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31212103023100 its reverse (132030121213), we get a palindrome (31344133144313).

The spelling of 31212103023100 in words is "thirty-one trillion, two hundred twelve billion, one hundred three million, twenty-three thousand, one hundred".