31203132010100 has 72 divisors (see below), whose sum is σ = 68431435654680. Its totient is φ = 12348501073920.

The previous prime is 31203132010093. The next prime is 31203132010117. The reversal of 31203132010100 is 101023130213.

It can be written as a sum of positive squares in 12 ways, for example, as 5253603221476 + 25949528788624 = 2292074^2 + 5094068^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28929296 + ... + 29988504.

It is an arithmetic number, because the mean of its divisors is an integer number (950436606315).

Almost surely, 2^{31203132010100} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31203132010100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34215717827340).

31203132010100 is an abundant number, since it is smaller than the sum of its proper divisors (37228303644580).

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

31203132010100 is a wasteful number, since it uses less digits than its factorization.

31203132010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062357 (or 1062350 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31203132010100 its reverse (101023130213), we get a palindrome (31304155140313).

The spelling of 31203132010100 in words is "thirty-one trillion, two hundred three billion, one hundred thirty-two million, ten thousand, one hundred".