2021012331 has 16 divisors (see below), whose sum is σ = 2909225760. Its totient is φ = 1240588800.

The previous prime is 2021012327. The next prime is 2021012339. The reversal of 2021012331 is 1332101202.

It is not a de Polignac number, because 2021012331 - 2² = 2021012327 is a prime.

It is a super-2 number, since 2×2021012331² = 8168981684108107122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2021012331.

It is not an unprimeable number, because it can be changed into a prime (2021012339) 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, 48976 + ... + 80253.

It is an arithmetic number, because the mean of its divisors is an integer number (181826610).

Almost surely, 2^2021012331 is an apocalyptic number.

2021012331 is a deficient number, since it is larger than the sum of its proper divisors (888213429).

2021012331 is a wasteful number, since it uses less digits than its factorization.

2021012331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129646.

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

The square root of 2021012331 is about 44955.6707324004. The cubic root of 2021012331 is about 1264.3180003173.

Adding to 2021012331 its reverse (1332101202), we get a palindrome (3353113533).

The spelling of 2021012331 in words is "two billion, twenty-one million, twelve thousand, three hundred thirty-one".