121756901 has 8 divisors (see below), whose sum is σ = 139344960. Its totient is φ = 104217408.

The previous prime is 121756897. The next prime is 121756909. The reversal of 121756901 is 109657121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121756901 - 2² = 121756897 is a prime.

It is a super-2 number, since 2×121756901² = 29649485882247602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121756909) 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, 6596 + ... + 16941.

It is an arithmetic number, because the mean of its divisors is an integer number (17418120).

Almost surely, 2^121756901 is an apocalyptic number.

It is an amenable number.

121756901 is a deficient number, since it is larger than the sum of its proper divisors (17588059).

121756901 is an equidigital number, since it uses as much as digits as its factorization.

121756901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24283.

The product of its (nonzero) digits is 3780, while the sum is 32.

The square root of 121756901 is about 11034.3509550857. The cubic root of 121756901 is about 495.6379232398.

The spelling of 121756901 in words is "one hundred twenty-one million, seven hundred fifty-six thousand, nine hundred one".