2021122111231 has 2 divisors, whose sum is σ = 2021122111232. Its totient is φ = 2021122111230.

The previous prime is 2021122111193. The next prime is 2021122111237. The reversal of 2021122111231 is 1321112211202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2021122111231 - 2¹⁹ = 2021121586943 is a prime.

It is a super-2 number, since 2×2021122111231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021122111199 and 2021122111208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021122111237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010561055615 + 1010561055616.

It is an arithmetic number, because the mean of its divisors is an integer number (1010561055616).

Almost surely, 2^{2021122111231} is an apocalyptic number.

2021122111231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021122111231 is an equidigital number, since it uses as much as digits as its factorization.

2021122111231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 2021122111231 its reverse (1321112211202), we get a palindrome (3342234322433).

The spelling of 2021122111231 in words is "two trillion, twenty-one billion, one hundred twenty-two million, one hundred eleven thousand, two hundred thirty-one".