1022002121999 has 4 divisors (see below), whose sum is σ = 1022004144336. Its totient is φ = 1022000099664.

The previous prime is 1022002121989. The next prime is 1022002122017. The reversal of 1022002121999 is 9991212002201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1022002121999 - 2⁴ = 1022002121983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022002121939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473462 + ... + 1506044.

It is an arithmetic number, because the mean of its divisors is an integer number (255501036084).

Almost surely, 2^{1022002121999} is an apocalyptic number.

1022002121999 is a deficient number, since it is larger than the sum of its proper divisors (2022337).

1022002121999 is an equidigital number, since it uses as much as digits as its factorization.

1022002121999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022336.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 1022002121999 in words is "one trillion, twenty-two billion, two million, one hundred twenty-one thousand, nine hundred ninety-nine".