31321100123201 has 4 divisors (see below), whose sum is σ = 35795542997952. Its totient is φ = 26846657248452.

The previous prime is 31321100123147. The next prime is 31321100123213. The reversal of 31321100123201 is 10232100112313.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31321100123201 - 2²² = 31321095928897 is a prime.

It is a super-2 number, since 2×31321100123201² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31321100123101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2237221437365 + ... + 2237221437378.

It is an arithmetic number, because the mean of its divisors is an integer number (8948885749488).

Almost surely, 2^{31321100123201} is an apocalyptic number.

It is an amenable number.

31321100123201 is a deficient number, since it is larger than the sum of its proper divisors (4474442874751).

31321100123201 is an equidigital number, since it uses as much as digits as its factorization.

31321100123201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4474442874750.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31321100123201 its reverse (10232100112313), we get a palindrome (41553200235514).

The spelling of 31321100123201 in words is "thirty-one trillion, three hundred twenty-one billion, one hundred million, one hundred twenty-three thousand, two hundred one".