121152515 has 16 divisors (see below), whose sum is σ = 160241760. Its totient is φ = 87198720.

The previous prime is 121152509. The next prime is 121152553. The reversal of 121152515 is 515251121.

It is not a de Polignac number, because 121152515 - 2⁸ = 121152259 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6020 + ... + 16689.

It is an arithmetic number, because the mean of its divisors is an integer number (10015110).

Almost surely, 2^121152515 is an apocalyptic number.

121152515 is a deficient number, since it is larger than the sum of its proper divisors (39089245).

121152515 is a wasteful number, since it uses less digits than its factorization.

121152515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22822.

The product of its digits is 500, while the sum is 23.

The square root of 121152515 is about 11006.9303168504. The cubic root of 121152515 is about 494.8164676874.

The spelling of 121152515 in words is "one hundred twenty-one million, one hundred fifty-two thousand, five hundred fifteen".