3120023021 has 4 divisors (see below), whose sum is σ = 3120792000. Its totient is φ = 3119254044.

The previous prime is 3120022991. The next prime is 3120023047. The reversal of 3120023021 is 1203200213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3120023021 - 2⁶ = 3120022957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3120022987 and 3120023005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3120023321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378371 + ... + 386528.

It is an arithmetic number, because the mean of its divisors is an integer number (780198000).

Almost surely, 2^3120023021 is an apocalyptic number.

It is an amenable number.

3120023021 is a deficient number, since it is larger than the sum of its proper divisors (768979).

3120023021 is an equidigital number, since it uses as much as digits as its factorization.

3120023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768978.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 3120023021 is about 55857.1662457021. The cubic root of 3120023021 is about 1461.2323087082.

Adding to 3120023021 its reverse (1203200213), we get a palindrome (4323223234).

The spelling of 3120023021 in words is "three billion, one hundred twenty million, twenty-three thousand, twenty-one".