2021123352331 has 4 divisors (see below), whose sum is σ = 2021263265952. Its totient is φ = 2020983438712.

The previous prime is 2021123352323. The next prime is 2021123352343. The reversal of 2021123352331 is 1332533211202.

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 2021123352331 - 2³ = 2021123352323 is a prime.

It is a super-2 number, since 2×2021123352331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021123352331.

It is not an unprimeable number, because it can be changed into a prime (2021123352431) 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, 69935140 + ... + 69964033.

It is an arithmetic number, because the mean of its divisors is an integer number (505315816488).

Almost surely, 2^{2021123352331} is an apocalyptic number.

2021123352331 is a deficient number, since it is larger than the sum of its proper divisors (139913621).

2021123352331 is a wasteful number, since it uses less digits than its factorization.

2021123352331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139913620.

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 2021123352331 its reverse (1332533211202), we get a palindrome (3353656563533).

The spelling of 2021123352331 in words is "two trillion, twenty-one billion, one hundred twenty-three million, three hundred fifty-two thousand, three hundred thirty-one".