2021232022921 has 2 divisors, whose sum is σ = 2021232022922. Its totient is φ = 2021232022920.

The previous prime is 2021232022903. The next prime is 2021232023003. The reversal of 2021232022921 is 1292202321202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2019368892025 + 1863130896 = 1421045^2 + 43164^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021232022921 - 2²¹ = 2021229925769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2021232022921.

It is not a weakly prime, because it can be changed into another prime (2021232020921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010616011460 + 1010616011461.

It is an arithmetic number, because the mean of its divisors is an integer number (1010616011461).

Almost surely, 2^{2021232022921} is an apocalyptic number.

It is an amenable number.

2021232022921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021232022921 is an equidigital number, since it uses as much as digits as its factorization.

2021232022921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 2021232022921 in words is "two trillion, twenty-one billion, two hundred thirty-two million, twenty-two thousand, nine hundred twenty-one".