31211030102 has 12 divisors (see below), whose sum is σ = 54460062900. Its totient is φ = 13376155716.

The previous prime is 31211030057. The next prime is 31211030111. The reversal of 31211030102 is 20103011213.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 159239852 + ... + 159240047.

It is an arithmetic number, because the mean of its divisors is an integer number (4538338575).

Almost surely, 2^31211030102 is an apocalyptic number.

31211030102 is a deficient number, since it is larger than the sum of its proper divisors (23249032798).

31211030102 is a wasteful number, since it uses less digits than its factorization.

31211030102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318479915 (or 318479908 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31211030102 its reverse (20103011213), we get a palindrome (51314041315).

The spelling of 31211030102 in words is "thirty-one billion, two hundred eleven million, thirty thousand, one hundred two".