312030021231 has 8 divisors (see below), whose sum is σ = 462266698160. Its totient is φ = 208020014136.

The previous prime is 312030021221. The next prime is 312030021239. The reversal of 312030021231 is 132120030213.

312030021231 is a `hidden beast` number, since 3 + 120 + 300 + 212 + 31 = 666.

It is not a de Polignac number, because 312030021231 - 2¹³ = 312030013039 is a prime.

It is a super-2 number, since 2×312030021231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312030021239) 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, 5778333700 + ... + 5778333753.

It is an arithmetic number, because the mean of its divisors is an integer number (57783337270).

Almost surely, 2^312030021231 is an apocalyptic number.

312030021231 is a deficient number, since it is larger than the sum of its proper divisors (150236676929).

312030021231 is a wasteful number, since it uses less digits than its factorization.

312030021231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11556667462 (or 11556667456 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 312030021231 its reverse (132120030213), we get a palindrome (444150051444).

The spelling of 312030021231 in words is "three hundred twelve billion, thirty million, twenty-one thousand, two hundred thirty-one".