200020210121999 has 2 divisors, whose sum is σ = 200020210122000. Its totient is φ = 200020210121998.

The previous prime is 200020210121989. The next prime is 200020210122053. The reversal of 200020210121999 is 999121012020002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 200020210121999 - 2¹⁶ = 200020210056463 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200020210121939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010105060999 + 100010105061000.

It is an arithmetic number, because the mean of its divisors is an integer number (100010105061000).

Almost surely, 2^{200020210121999} is an apocalyptic number.

200020210121999 is a deficient number, since it is larger than the sum of its proper divisors (1).

200020210121999 is an equidigital number, since it uses as much as digits as its factorization.

200020210121999 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 38.

The spelling of 200020210121999 in words is "two hundred trillion, twenty billion, two hundred ten million, one hundred twenty-one thousand, nine hundred ninety-nine".