2021111222031 has 24 divisors (see below), whose sum is σ = 3185486778240. Its totient is φ = 1224644562000.

The previous prime is 2021111222023. The next prime is 2021111222041. The reversal of 2021111222031 is 1302221111202.

It is not a de Polignac number, because 2021111222031 - 2³ = 2021111222023 is a prime.

It is a super-2 number, since 2×2021111222031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021111221995 and 2021111222013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021111222041) 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, 1811445 + ... + 2706206.

It is an arithmetic number, because the mean of its divisors is an integer number (132728615760).

Almost surely, 2^{2021111222031} is an apocalyptic number.

2021111222031 is a deficient number, since it is larger than the sum of its proper divisors (1164375556209).

2021111222031 is a wasteful number, since it uses less digits than its factorization.

2021111222031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4522187 (or 4522184 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2021111222031 its reverse (1302221111202), we get a palindrome (3323332333233).

The spelling of 2021111222031 in words is "two trillion, twenty-one billion, one hundred eleven million, two hundred twenty-two thousand, thirty-one".