31020213102 has 16 divisors (see below), whose sum is σ = 62044043472. Its totient is φ = 10339468160.

The previous prime is 31020213097. The next prime is 31020213121. The reversal of 31020213102 is 20131202013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32049 + ... + 251132.

It is an arithmetic number, because the mean of its divisors is an integer number (3877752717).

Almost surely, 2^31020213102 is an apocalyptic number.

31020213102 is an abundant number, since it is smaller than the sum of its proper divisors (31023830370).

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

31020213102 is a wasteful number, since it uses less digits than its factorization.

31020213102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301443.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31020213102 its reverse (20131202013), we get a palindrome (51151415115).

The spelling of 31020213102 in words is "thirty-one billion, twenty million, two hundred thirteen thousand, one hundred two".