31321213012102 has 32 divisors (see below), whose sum is σ = 51210727958880. Its totient is φ = 14280288664320.

The previous prime is 31321213012099. The next prime is 31321213012123. The reversal of 31321213012102 is 20121031212313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20097274 + ... + 21599602.

It is an arithmetic number, because the mean of its divisors is an integer number (1600335248715).

Almost surely, 2^{31321213012102} is an apocalyptic number.

31321213012102 is a deficient number, since it is larger than the sum of its proper divisors (19889514946778).

31321213012102 is a wasteful number, since it uses less digits than its factorization.

31321213012102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512088.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31321213012102 its reverse (20121031212313), we get a palindrome (51442244224415).

The spelling of 31321213012102 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred thirteen million, twelve thousand, one hundred two".