121309355 has 8 divisors (see below), whose sum is σ = 150267264. Its totient is φ = 93916800.

The previous prime is 121309351. The next prime is 121309361. The reversal of 121309355 is 553903121.

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

It is not a de Polignac number, because 121309355 - 2² = 121309351 is a prime.

It is a super-2 number, since 2×121309355² = 29431919221032050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121309351) 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, 391166 + ... + 391475.

It is an arithmetic number, because the mean of its divisors is an integer number (18783408).

Almost surely, 2^121309355 is an apocalyptic number.

121309355 is a deficient number, since it is larger than the sum of its proper divisors (28957909).

121309355 is an equidigital number, since it uses as much as digits as its factorization.

121309355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782677.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 121309355 is about 11014.0526147282. The cubic root of 121309355 is about 495.0298999046.

The spelling of 121309355 in words is "one hundred twenty-one million, three hundred nine thousand, three hundred fifty-five".