121257115 has 12 divisors (see below), whose sum is σ = 169265376. Its totient is φ = 83147568.

The previous prime is 121257083. The next prime is 121257121. The reversal of 121257115 is 511752121.

It is not a de Polignac number, because 121257115 - 2⁵ = 121257083 is a prime.

It is a super-3 number, since 3×121257115³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121257115.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 247219 + ... + 247708.

It is an arithmetic number, because the mean of its divisors is an integer number (14105448).

Almost surely, 2^121257115 is an apocalyptic number.

121257115 is a deficient number, since it is larger than the sum of its proper divisors (48008261).

121257115 is an equidigital number, since it uses as much as digits as its factorization.

121257115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494946 (or 494939 counting only the distinct ones).

The product of its digits is 700, while the sum is 25.

The square root of 121257115 is about 11011.6808435406. The cubic root of 121257115 is about 494.9588307086.

The spelling of 121257115 in words is "one hundred twenty-one million, two hundred fifty-seven thousand, one hundred fifteen".