102120999988 has 48 divisors (see below), whose sum is σ = 204827808640. Its totient is φ = 43640809344.

The previous prime is 102120999961. The next prime is 102120999989. The reversal of 102120999988 is 889999021201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120999989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15163870 + ... + 15170602.

Almost surely, 2^102120999988 is an apocalyptic number.

It is an amenable number.

102120999988 is an abundant number, since it is smaller than the sum of its proper divisors (102706808652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102120999988 is a wasteful number, since it uses less digits than its factorization.

102120999988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8216 (or 8214 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 58.

The spelling of 102120999988 in words is "one hundred two billion, one hundred twenty million, nine hundred ninety-nine thousand, nine hundred eighty-eight".