2021402331 has 16 divisors (see below), whose sum is σ = 3225029920. Its totient is φ = 1243939680.

The previous prime is 2021402297. The next prime is 2021402353. The reversal of 2021402331 is 1332041202.

It is not a de Polignac number, because 2021402331 - 2⁷ = 2021402203 is a prime.

It is a super-2 number, since 2×2021402331² = 8172134767544467122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021402431) 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, 2879140 + ... + 2879841.

It is an arithmetic number, because the mean of its divisors is an integer number (201564370).

Almost surely, 2^2021402331 is an apocalyptic number.

2021402331 is a deficient number, since it is larger than the sum of its proper divisors (1203627589).

2021402331 is a wasteful number, since it uses less digits than its factorization.

2021402331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5759003 (or 5758997 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2021402331 is about 44960.0081294477. The cubic root of 2021402331 is about 1264.3993213297.

Adding to 2021402331 its reverse (1332041202), we get a palindrome (3353443533).

The spelling of 2021402331 in words is "two billion, twenty-one million, four hundred two thousand, three hundred thirty-one".