2120331021 has 16 divisors (see below), whose sum is σ = 2837304960. Its totient is φ = 1408466880.

The previous prime is 2120331013. The next prime is 2120331041. The reversal of 2120331021 is 1201330212.

It is not a de Polignac number, because 2120331021 - 2³ = 2120331013 is a prime.

It is a super-2 number, since 2×2120331021² = 8991607277229804882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120331041) 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, 1724635 + ... + 1725863.

It is an arithmetic number, because the mean of its divisors is an integer number (177331560).

Almost surely, 2^2120331021 is an apocalyptic number.

It is an amenable number.

2120331021 is a deficient number, since it is larger than the sum of its proper divisors (716973939).

2120331021 is a wasteful number, since it uses less digits than its factorization.

2120331021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2120331021 is about 46047.0522509313. The cubic root of 2120331021 is about 1284.6985158768.

Adding to 2120331021 its reverse (1201330212), we get a palindrome (3321661233).

The spelling of 2120331021 in words is "two billion, one hundred twenty million, three hundred thirty-one thousand, twenty-one".