31213021102 has 8 divisors (see below), whose sum is σ = 48855163536. Its totient is φ = 14927966592.

The previous prime is 31213021093. The next prime is 31213021157. The reversal of 31213021102 is 20112031213.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 339271923 + ... + 339272014.

It is an arithmetic number, because the mean of its divisors is an integer number (6106895442).

Almost surely, 2^31213021102 is an apocalyptic number.

31213021102 is a deficient number, since it is larger than the sum of its proper divisors (17642142434).

31213021102 is a wasteful number, since it uses less digits than its factorization.

31213021102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678543962.

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

Adding to 31213021102 its reverse (20112031213), we get a palindrome (51325052315).

The spelling of 31213021102 in words is "thirty-one billion, two hundred thirteen million, twenty-one thousand, one hundred two".