1999990202102 has 16 divisors (see below), whose sum is σ = 3086059681440. Its totient is φ = 971391250368.

The previous prime is 1999990202059. The next prime is 1999990202113. The reversal of 1999990202102 is 2012020999991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21856202 + ... + 21947517.

It is an arithmetic number, because the mean of its divisors is an integer number (192878730090).

Almost surely, 2^{1999990202102} is an apocalyptic number.

1999990202102 is a deficient number, since it is larger than the sum of its proper divisors (1086069479338).

1999990202102 is a wasteful number, since it uses less digits than its factorization.

1999990202102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43804375.

The product of its (nonzero) digits is 472392, while the sum is 53.

The spelling of 1999990202102 in words is "one trillion, nine hundred ninety-nine billion, nine hundred ninety million, two hundred two thousand, one hundred two".