121138788 has 24 divisors (see below), whose sum is σ = 284558400. Its totient is φ = 40108000.

The previous prime is 121138781. The next prime is 121138789. The reversal of 121138788 is 887831121.

It is not an unprimeable number, because it can be changed into a prime (121138781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32088 + ... + 35663.

It is an arithmetic number, because the mean of its divisors is an integer number (11856600).

Almost surely, 2^121138788 is an apocalyptic number.

It is an amenable number.

121138788 is an abundant number, since it is smaller than the sum of its proper divisors (163419612).

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

121138788 is a wasteful number, since it uses less digits than its factorization.

121138788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67907 (or 67905 counting only the distinct ones).

The product of its digits is 21504, while the sum is 39.

The square root of 121138788 is about 11006.3067375028. The cubic root of 121138788 is about 494.7977788410.

The spelling of 121138788 in words is "one hundred twenty-one million, one hundred thirty-eight thousand, seven hundred eighty-eight".