99920210123 has 32 divisors (see below), whose sum is σ = 110909736000. Its totient is φ = 89591169024.

The previous prime is 99920210119. The next prime is 99920210141. The reversal of 99920210123 is 32101202999.

It is not a de Polignac number, because 99920210123 - 2² = 99920210119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99920210183) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16686536 + ... + 16692522.

It is an arithmetic number, because the mean of its divisors is an integer number (3465929250).

Almost surely, 2^99920210123 is an apocalyptic number.

99920210123 is a deficient number, since it is larger than the sum of its proper divisors (10989525877).

99920210123 is a wasteful number, since it uses less digits than its factorization.

99920210123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6479.

The product of its (nonzero) digits is 17496, while the sum is 38.

The spelling of 99920210123 in words is "ninety-nine billion, nine hundred twenty million, two hundred ten thousand, one hundred twenty-three".