121389612 has 24 divisors (see below), whose sum is σ = 284496576. Its totient is φ = 40284048.

The previous prime is 121389589. The next prime is 121389629. The reversal of 121389612 is 216983121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19558 + ... + 25005.

It is an arithmetic number, because the mean of its divisors is an integer number (11854024).

Almost surely, 2^121389612 is an apocalyptic number.

121389612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121389612 is an abundant number, since it is smaller than the sum of its proper divisors (163106964).

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

121389612 is a wasteful number, since it uses less digits than its factorization.

121389612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44797 (or 44795 counting only the distinct ones).

The product of its digits is 5184, while the sum is 33.

The square root of 121389612 is about 11017.6954033046. The cubic root of 121389612 is about 495.1390447059.

The spelling of 121389612 in words is "one hundred twenty-one million, three hundred eighty-nine thousand, six hundred twelve".