121899357 has 8 divisors (see below), whose sum is σ = 180591680. Its totient is φ = 81266220.

The previous prime is 121899343. The next prime is 121899359. The reversal of 121899357 is 753998121.

It is not a de Polignac number, because 121899357 - 2⁶ = 121899293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121899359) 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, 2257369 + ... + 2257422.

It is an arithmetic number, because the mean of its divisors is an integer number (22573960).

Almost surely, 2^121899357 is an apocalyptic number.

It is an amenable number.

121899357 is a deficient number, since it is larger than the sum of its proper divisors (58692323).

121899357 is an equidigital number, since it uses as much as digits as its factorization.

121899357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4514800 (or 4514794 counting only the distinct ones).

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

The square root of 121899357 is about 11040.8041826671. The cubic root of 121899357 is about 495.8311472697.

The spelling of 121899357 in words is "one hundred twenty-one million, eight hundred ninety-nine thousand, three hundred fifty-seven".