2021420331 has 24 divisors (see below), whose sum is σ = 3338141664. Its totient is φ = 1154684160.

The previous prime is 2021420311. The next prime is 2021420399. The reversal of 2021420331 is 1330241202.

It is not a de Polignac number, because 2021420331 - 2¹⁴ = 2021403947 is a prime.

It is a super-2 number, since 2×2021420331² = 8172280309160299122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021420311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 300141 + ... + 306801.

It is an arithmetic number, because the mean of its divisors is an integer number (139089236).

Almost surely, 2^2021420331 is an apocalyptic number.

2021420331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2021420331 is a deficient number, since it is larger than the sum of its proper divisors (1316721333).

2021420331 is a wasteful number, since it uses less digits than its factorization.

2021420331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11491 (or 11488 counting only the distinct ones).

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

The square root of 2021420331 is about 44960.2083069018. The cubic root of 2021420331 is about 1264.4030743546.

Adding to 2021420331 its reverse (1330241202), we get a palindrome (3351661533).

The spelling of 2021420331 in words is "two billion, twenty-one million, four hundred twenty thousand, three hundred thirty-one".