312031100120221 has 8 divisors (see below), whose sum is σ = 315060891891200. Its totient is φ = 309001315342032.

The previous prime is 312031100120191. The next prime is 312031100120261. The reversal of 312031100120221 is 122021001130213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312031100120221 - 2²³ = 312031091731613 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 (312031100120261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162308980 + ... + 164220178.

It is an arithmetic number, because the mean of its divisors is an integer number (39382611486400).

Almost surely, 2^{312031100120221} is an apocalyptic number.

It is an amenable number.

312031100120221 is a deficient number, since it is larger than the sum of its proper divisors (3029791770979).

312031100120221 is a wasteful number, since it uses less digits than its factorization.

312031100120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3496395.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 312031100120221 its reverse (122021001130213), we get a palindrome (434052101250434).

The spelling of 312031100120221 in words is "three hundred twelve trillion, thirty-one billion, one hundred million, one hundred twenty thousand, two hundred twenty-one".