20020001221999 has 2 divisors, whose sum is σ = 20020001222000. Its totient is φ = 20020001221998.

The previous prime is 20020001221963. The next prime is 20020001222021. The reversal of 20020001221999 is 99912210002002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20020001221999 - 2⁹ = 20020001221487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20020001231999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010000610999 + 10010000611000.

It is an arithmetic number, because the mean of its divisors is an integer number (10010000611000).

Almost surely, 2^{20020001221999} is an apocalyptic number.

20020001221999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020001221999 is an equidigital number, since it uses as much as digits as its factorization.

20020001221999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 37.

The spelling of 20020001221999 in words is "twenty trillion, twenty billion, one million, two hundred twenty-one thousand, nine hundred ninety-nine".