312030222232021 has 16 divisors (see below), whose sum is σ = 313564970048176. Its totient is φ = 310497546240000.

The previous prime is 312030222232013. The next prime is 312030222232073. The reversal of 312030222232021 is 120232222030213.

It can be written as a sum of positive squares in 8 ways, for example, as 17993808931921 + 294036413300100 = 4241911^2 + 17147490^2 .

It is a cyclic number.

It is not a de Polignac number, because 312030222232021 - 2³ = 312030222232013 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 (312030222235021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1750323031 + ... + 1750501291.

It is an arithmetic number, because the mean of its divisors is an integer number (19597810628011).

Almost surely, 2^{312030222232021} is an apocalyptic number.

It is an amenable number.

312030222232021 is a deficient number, since it is larger than the sum of its proper divisors (1534747816155).

312030222232021 is a wasteful number, since it uses less digits than its factorization.

312030222232021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184024.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 312030222232021 its reverse (120232222030213), we get a palindrome (432262444262234).

The spelling of 312030222232021 in words is "three hundred twelve trillion, thirty billion, two hundred twenty-two million, two hundred thirty-two thousand, twenty-one".