31311320322101 has 24 divisors (see below), whose sum is σ = 33298444903104. Its totient is φ = 29436915493440.

The previous prime is 31311320322091. The next prime is 31311320322119. The reversal of 31311320322101 is 10122302311313.

It is a de Polignac number, because none of the positive numbers 2^k-31311320322101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311320322901) 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, 148809896 + ... + 149020158.

It is an arithmetic number, because the mean of its divisors is an integer number (1387435204296).

Almost surely, 2^{31311320322101} is an apocalyptic number.

It is an amenable number.

31311320322101 is a deficient number, since it is larger than the sum of its proper divisors (1987124581003).

31311320322101 is a wasteful number, since it uses less digits than its factorization.

31311320322101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213449 (or 213430 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31311320322101 its reverse (10122302311313), we get a palindrome (41433622633414).

The spelling of 31311320322101 in words is "thirty-one trillion, three hundred eleven billion, three hundred twenty million, three hundred twenty-two thousand, one hundred one".