31320322132100 has 72 divisors (see below), whose sum is σ = 68870273770368. Its totient is φ = 12361655209600.

The previous prime is 31320322132067. The next prime is 31320322132109. The reversal of 31320322132100 is 123122302313.

It is not an unprimeable number, because it can be changed into a prime (31320322132109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4247765 + ... + 8982435.

It is an arithmetic number, because the mean of its divisors is an integer number (956531580144).

Almost surely, 2^{31320322132100} 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 31320322132100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34435136885184).

31320322132100 is an abundant number, since it is smaller than the sum of its proper divisors (37549951638268).

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

31320322132100 is a wasteful number, since it uses less digits than its factorization.

31320322132100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4735565 (or 4735558 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31320322132100 its reverse (123122302313), we get a palindrome (31443444434413).

The spelling of 31320322132100 in words is "thirty-one trillion, three hundred twenty billion, three hundred twenty-two million, one hundred thirty-two thousand, one hundred".