1022020999 has 2 divisors, whose sum is σ = 1022021000. Its totient is φ = 1022020998.

The previous prime is 1022020957. The next prime is 1022021009. The reversal of 1022020999 is 9990202201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1022020999 - 2¹³ = 1022012807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022020099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511010499 + 511010500.

It is an arithmetic number, because the mean of its divisors is an integer number (511010500).

Almost surely, 2^1022020999 is an apocalyptic number.

1022020999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022020999 is an equidigital number, since it uses as much as digits as its factorization.

1022020999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 1022020999 is about 31969.0631548690. The cubic root of 1022020999 is about 1007.2871021559.

The spelling of 1022020999 in words is "one billion, twenty-two million, twenty thousand, nine hundred ninety-nine".