10202121999 has 12 divisors (see below), whose sum is σ = 15134679976. Its totient is φ = 6617592432.

The previous prime is 10202121967. The next prime is 10202122037. The reversal of 10202121999 is 99912120201.

It is not a de Polignac number, because 10202121999 - 2⁵ = 10202121967 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 (10202121199) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15318169 + ... + 15318834.

Almost surely, 2^10202121999 is an apocalyptic number.

10202121999 is a deficient number, since it is larger than the sum of its proper divisors (4932557977).

10202121999 is a wasteful number, since it uses less digits than its factorization.

10202121999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30637046 (or 30637043 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 10202121999 in words is "ten billion, two hundred two million, one hundred twenty-one thousand, nine hundred ninety-nine".