312242021 has 16 divisors (see below), whose sum is σ = 384854400. Its totient is φ = 246691008.

The previous prime is 312242011. The next prime is 312242033. The reversal of 312242021 is 120242213.

It is a cyclic number.

It is not a de Polignac number, because 312242021 - 2⁶ = 312241957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312242011) 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, 73370 + ... + 77508.

It is an arithmetic number, because the mean of its divisors is an integer number (24053400).

Almost surely, 2^312242021 is an apocalyptic number.

It is an amenable number.

312242021 is a deficient number, since it is larger than the sum of its proper divisors (72612379).

312242021 is a wasteful number, since it uses less digits than its factorization.

312242021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4988.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 312242021 is about 17670.3712751034. The cubic root of 312242021 is about 678.4176160081.

Adding to 312242021 its product of nonzero digits (192), we get a palindrome (312242213).

Adding to 312242021 its reverse (120242213), we get a palindrome (432484234).

The spelling of 312242021 in words is "three hundred twelve million, two hundred forty-two thousand, twenty-one".