999990202102 has 16 divisors (see below), whose sum is σ = 1565683446240. Its totient is φ = 478109092032.

The previous prime is 999990202091. The next prime is 999990202129. The reversal of 999990202102 is 201202099999.

It is a self number, because there is not a number n which added to its sum of digits gives 999990202102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3191727 + ... + 3491002.

It is an arithmetic number, because the mean of its divisors is an integer number (97855215390).

Almost surely, 2^999990202102 is an apocalyptic number.

999990202102 is a deficient number, since it is larger than the sum of its proper divisors (565693244138).

999990202102 is a wasteful number, since it uses less digits than its factorization.

999990202102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6686007.

The product of its (nonzero) digits is 472392, while the sum is 52.

The spelling of 999990202102 in words is "nine hundred ninety-nine billion, nine hundred ninety million, two hundred two thousand, one hundred two".