31211243102 has 32 divisors (see below), whose sum is σ = 50813995680. Its totient is φ = 14292535680.

The previous prime is 31211243093. The next prime is 31211243113. The reversal of 31211243102 is 20134211213.

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, 1735577 + ... + 1753467.

It is an arithmetic number, because the mean of its divisors is an integer number (1587937365).

Almost surely, 2^31211243102 is an apocalyptic number.

31211243102 is a deficient number, since it is larger than the sum of its proper divisors (19602752578).

31211243102 is a wasteful number, since it uses less digits than its factorization.

31211243102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18428.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31211243102 its reverse (20134211213), we get a palindrome (51345454315).

The spelling of 31211243102 in words is "thirty-one billion, two hundred eleven million, two hundred forty-three thousand, one hundred two".