121997358 has 36 divisors (see below), whose sum is σ = 307485360. Its totient is φ = 34856136.

The previous prime is 121997357. The next prime is 121997371. The reversal of 121997358 is 853799121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121997353) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 68278 + ... + 70041.

It is an arithmetic number, because the mean of its divisors is an integer number (8541260).

Almost surely, 2^121997358 is an apocalyptic number.

121997358 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

121997358 is an abundant number, since it is smaller than the sum of its proper divisors (185488002).

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

121997358 is a wasteful number, since it uses less digits than its factorization.

121997358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138341 (or 138331 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 121997358 is about 11045.2414188192. The cubic root of 121997358 is about 495.9639861772.

The spelling of 121997358 in words is "one hundred twenty-one million, nine hundred ninety-seven thousand, three hundred fifty-eight".