102121880 has 48 divisors (see below), whose sum is σ = 267293520. Its totient is φ = 35012544.

The previous prime is 102121879. The next prime is 102121883. The reversal of 102121880 is 88121201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121883) 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, 24092 + ... + 28011.

It is an arithmetic number, because the mean of its divisors is an integer number (5568615).

Almost surely, 2^102121880 is an apocalyptic number.

102121880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102121880 is an abundant number, since it is smaller than the sum of its proper divisors (165171640).

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

102121880 is a wasteful number, since it uses less digits than its factorization.

102121880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52128 (or 52117 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 102121880 is about 10105.5370960677. The cubic root of 102121880 is about 467.4188979199.

The spelling of 102121880 in words is "one hundred two million, one hundred twenty-one thousand, eight hundred eighty".