2021121983 has 2 divisors, whose sum is σ = 2021121984. Its totient is φ = 2021121982.

The previous prime is 2021121953. The next prime is 2021122001. The reversal of 2021121983 is 3891211202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2021121983 - 2¹⁴ = 2021105599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021121953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010560991 + 1010560992.

It is an arithmetic number, because the mean of its divisors is an integer number (1010560992).

Almost surely, 2^2021121983 is an apocalyptic number.

2021121983 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021121983 is an equidigital number, since it uses as much as digits as its factorization.

2021121983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 2021121983 is about 44956.8902727936. The cubic root of 2021121983 is about 1264.3408655069.

The spelling of 2021121983 in words is "two billion, twenty-one million, one hundred twenty-one thousand, nine hundred eighty-three".