2021123133231 has 32 divisors (see below), whose sum is σ = 2866068199680. Its totient is φ = 1263278592000.

The previous prime is 2021123133223. The next prime is 2021123133233. The reversal of 2021123133231 is 1323313211202.

It is not a de Polignac number, because 2021123133231 - 2³ = 2021123133223 is a prime.

It is a super-2 number, since 2×2021123133231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021123133233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12602991 + ... + 12762351.

It is an arithmetic number, because the mean of its divisors is an integer number (89564631240).

Almost surely, 2^{2021123133231} is an apocalyptic number.

2021123133231 is a deficient number, since it is larger than the sum of its proper divisors (844945066449).

2021123133231 is a wasteful number, since it uses less digits than its factorization.

2021123133231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161687.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 2021123133231 its reverse (1323313211202), we get a palindrome (3344436344433).

The spelling of 2021123133231 in words is "two trillion, twenty-one billion, one hundred twenty-three million, one hundred thirty-three thousand, two hundred thirty-one".