2021122399 has 2 divisors, whose sum is σ = 2021122400. Its totient is φ = 2021122398.

The previous prime is 2021122393. The next prime is 2021122403. The reversal of 2021122399 is 9932211202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2021122399 - 2³ = 2021122391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2021122399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021122391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010561199 + 1010561200.

It is an arithmetic number, because the mean of its divisors is an integer number (1010561200).

Almost surely, 2^2021122399 is an apocalyptic number.

2021122399 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021122399 is an equidigital number, since it uses as much as digits as its factorization.

2021122399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 2021122399 is about 44956.8948994478. The cubic root of 2021122399 is about 1264.3409522517.

The spelling of 2021122399 in words is "two billion, twenty-one million, one hundred twenty-two thousand, three hundred ninety-nine".