3123312021 has 16 divisors (see below), whose sum is σ = 4674835200. Its totient is φ = 2060740224.

The previous prime is 3123312007. The next prime is 3123312037. The reversal of 3123312021 is 1202133213.

3123312021 is a `hidden beast` number, since 312 + 331 + 2 + 0 + 21 = 666.

It is not a de Polignac number, because 3123312021 - 2²² = 3119117717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3123311985 and 3123312003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3123312061) 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, 593661 + ... + 598898.

It is an arithmetic number, because the mean of its divisors is an integer number (292177200).

Almost surely, 2^3123312021 is an apocalyptic number.

It is an amenable number.

3123312021 is a deficient number, since it is larger than the sum of its proper divisors (1551523179).

3123312021 is a wasteful number, since it uses less digits than its factorization.

3123312021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192665 (or 1192659 counting only the distinct ones).

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

The square root of 3123312021 is about 55886.5996550157. The cubic root of 3123312021 is about 1461.7455854009.

Adding to 3123312021 its reverse (1202133213), we get a palindrome (4325445234).

The spelling of 3123312021 in words is "three billion, one hundred twenty-three million, three hundred twelve thousand, twenty-one".