31121032102 has 64 divisors (see below), whose sum is σ = 52036992000. Its totient is φ = 13900094208.

The previous prime is 31121032097. The next prime is 31121032109. The reversal of 31121032102 is 20123012113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121032109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8138563 + ... + 8142385.

It is an arithmetic number, because the mean of its divisors is an integer number (813078000).

Almost surely, 2^31121032102 is an apocalyptic number.

31121032102 is a deficient number, since it is larger than the sum of its proper divisors (20915959898).

31121032102 is a wasteful number, since it uses less digits than its factorization.

31121032102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4045.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31121032102 its reverse (20123012113), we get a palindrome (51244044215).

The spelling of 31121032102 in words is "thirty-one billion, one hundred twenty-one million, thirty-two thousand, one hundred two".