31311121213102 has 16 divisors (see below), whose sum is σ = 49481122066560. Its totient is φ = 14818830845112.

The previous prime is 31311121213051. The next prime is 31311121213109. The reversal of 31311121213102 is 20131212111313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311121213109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354202098 + ... + 354290485.

It is an arithmetic number, because the mean of its divisors is an integer number (3092570129160).

Almost surely, 2^{31311121213102} is an apocalyptic number.

31311121213102 is a deficient number, since it is larger than the sum of its proper divisors (18170000853458).

31311121213102 is a wasteful number, since it uses less digits than its factorization.

31311121213102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708493767.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 31311121213102 its reverse (20131212111313), we get a palindrome (51442333324415).

The spelling of 31311121213102 in words is "thirty-one trillion, three hundred eleven billion, one hundred twenty-one million, two hundred thirteen thousand, one hundred two".