312232021 has 2 divisors, whose sum is σ = 312232022. Its totient is φ = 312232020.

The previous prime is 312232007. The next prime is 312232057. The reversal of 312232021 is 120232213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 298909521 + 13322500 = 17289^2 + 3650^2 .

It is a cyclic number.

It is not a de Polignac number, because 312232021 - 2¹³ = 312223829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312231986 and 312232004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312232321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156116010 + 156116011.

It is an arithmetic number, because the mean of its divisors is an integer number (156116011).

Almost surely, 2^312232021 is an apocalyptic number.

It is an amenable number.

312232021 is a deficient number, since it is larger than the sum of its proper divisors (1).

312232021 is an equidigital number, since it uses as much as digits as its factorization.

312232021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 312232021 is about 17670.0883133051. The cubic root of 312232021 is about 678.4103734973.

Adding to 312232021 its reverse (120232213), we get a palindrome (432464234).

The spelling of 312232021 in words is "three hundred twelve million, two hundred thirty-two thousand, twenty-one".