1020102019999 has 4 divisors (see below), whose sum is σ = 1020205709280. Its totient is φ = 1019998330720.

The previous prime is 1020102019973. The next prime is 1020102020011. The reversal of 1020102019999 is 9999102010201.

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 1020102019999 - 2¹³ = 1020102011807 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 (1020102019939) 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, 51829882 + ... + 51849559.

It is an arithmetic number, because the mean of its divisors is an integer number (255051427320).

Almost surely, 2^{1020102019999} is an apocalyptic number.

1020102019999 is a deficient number, since it is larger than the sum of its proper divisors (103689281).

1020102019999 is an equidigital number, since it uses as much as digits as its factorization.

1020102019999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103689280.

The product of its (nonzero) digits is 26244, while the sum is 43.

The spelling of 1020102019999 in words is "one trillion, twenty billion, one hundred two million, nineteen thousand, nine hundred ninety-nine".