2021112131 has 4 divisors (see below), whose sum is σ = 2028797232. Its totient is φ = 2013427032.

The previous prime is 2021112127. The next prime is 2021112169. The reversal of 2021112131 is 1312111202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2021112131 - 2² = 2021112127 is a prime.

It is a super-2 number, since 2×2021112131² = 8169788492150722322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021118131) 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, 3842156 + ... + 3842681.

It is an arithmetic number, because the mean of its divisors is an integer number (507199308).

Almost surely, 2^2021112131 is an apocalyptic number.

2021112131 is a deficient number, since it is larger than the sum of its proper divisors (7685101).

2021112131 is an equidigital number, since it uses as much as digits as its factorization.

2021112131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7685100.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 2021112131 is about 44956.7807010244. The cubic root of 2021112131 is about 1264.3388111518.

Adding to 2021112131 its reverse (1312111202), we get a palindrome (3333223333).

The spelling of 2021112131 in words is "two billion, twenty-one million, one hundred twelve thousand, one hundred thirty-one".