121166515 has 8 divisors (see below), whose sum is σ = 153052560. Its totient is φ = 91831392.

The previous prime is 121166503. The next prime is 121166519. The reversal of 121166515 is 515661121.

It is a happy number.

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 121166515 - 2⁷ = 121166387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121166519) 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, 637624 + ... + 637813.

It is an arithmetic number, because the mean of its divisors is an integer number (19131570).

Almost surely, 2^121166515 is an apocalyptic number.

121166515 is a deficient number, since it is larger than the sum of its proper divisors (31886045).

121166515 is a wasteful number, since it uses less digits than its factorization.

121166515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275461.

The product of its digits is 1800, while the sum is 28.

The square root of 121166515 is about 11007.5662614404. The cubic root of 121166515 is about 494.8355267599.

The spelling of 121166515 in words is "one hundred twenty-one million, one hundred sixty-six thousand, five hundred fifteen".