31011213102 has 32 divisors (see below), whose sum is σ = 65712168864. Its totient is φ = 9722880000.

The previous prime is 31011213073. The next prime is 31011213127. The reversal of 31011213102 is 20131211013.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68352 + ... + 258252.

It is an arithmetic number, because the mean of its divisors is an integer number (2053505277).

Almost surely, 2^31011213102 is an apocalyptic number.

31011213102 is an abundant number, since it is smaller than the sum of its proper divisors (34700955762).

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

31011213102 is a wasteful number, since it uses less digits than its factorization.

31011213102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191524.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31011213102 its reverse (20131211013), we get a palindrome (51142424115).

The spelling of 31011213102 in words is "thirty-one billion, eleven million, two hundred thirteen thousand, one hundred two".