31121030232100 has 36 divisors (see below), whose sum is σ = 67572525301204. Its totient is φ = 12441059153280.

The previous prime is 31121030232079. The next prime is 31121030232197. The reversal of 31121030232100 is 123203012113.

It can be written as a sum of positive squares in 6 ways, for example, as 253427669056 + 30867602563044 = 503416^2 + 5555862^2 .

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, 91741599 + ... + 92080198.

Almost surely, 2^{31121030232100} is an apocalyptic number.

It is an amenable number.

31121030232100 is an abundant number, since it is smaller than the sum of its proper divisors (36451495069104).

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

31121030232100 is a wasteful number, since it uses less digits than its factorization.

31121030232100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183823504 (or 183823497 counting only the distinct ones).

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

Adding to 31121030232100 its reverse (123203012113), we get a palindrome (31244233244213).

The spelling of 31121030232100 in words is "thirty-one trillion, one hundred twenty-one billion, thirty million, two hundred thirty-two thousand, one hundred".