121019688 has 48 divisors (see below), whose sum is σ = 332666880. Its totient is φ = 39736224.

The previous prime is 121019687. The next prime is 121019693. The reversal of 121019688 is 886910121.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (121019687) 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, 7720 + ... + 17367.

It is an arithmetic number, because the mean of its divisors is an integer number (6930560).

Almost surely, 2^121019688 is an apocalyptic number.

121019688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121019688 is an abundant number, since it is smaller than the sum of its proper divisors (211647192).

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

121019688 is a wasteful number, since it uses less digits than its factorization.

121019688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25166 (or 25159 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 121019688 is about 11000.8948726910. The cubic root of 121019688 is about 494.6355689223.

The spelling of 121019688 in words is "one hundred twenty-one million, nineteen thousand, six hundred eighty-eight".