31312230012102 has 128 divisors (see below), whose sum is σ = 71312224241664. Its totient is φ = 9093579568128.

The previous prime is 31312230012061. The next prime is 31312230012131. The reversal of 31312230012102 is 20121003221313.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40663488 + ... + 41426364.

It is an arithmetic number, because the mean of its divisors is an integer number (557126751888).

Almost surely, 2^{31312230012102} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31312230012102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35656112120832).

31312230012102 is an abundant number, since it is smaller than the sum of its proper divisors (39999994229562).

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

31312230012102 is a wasteful number, since it uses less digits than its factorization.

31312230012102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763222.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31312230012102 its reverse (20121003221313), we get a palindrome (51433233233415).

The spelling of 31312230012102 in words is "thirty-one trillion, three hundred twelve billion, two hundred thirty million, twelve thousand, one hundred two".