121515069 has 16 divisors (see below), whose sum is σ = 178198272. Its totient is φ = 73186368.

The previous prime is 121515059. The next prime is 121515077. The reversal of 121515069 is 960515121.

It is not a de Polignac number, because 121515069 - 2⁷ = 121514941 is a prime.

It is a super-2 number, since 2×121515069² = 29531823988149522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121515029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31314 + ... + 34979.

It is an arithmetic number, because the mean of its divisors is an integer number (11137392).

Almost surely, 2^121515069 is an apocalyptic number.

It is an amenable number.

121515069 is a deficient number, since it is larger than the sum of its proper divisors (56683203).

121515069 is a wasteful number, since it uses less digits than its factorization.

121515069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66356.

The product of its (nonzero) digits is 2700, while the sum is 30.

The square root of 121515069 is about 11023.3873650525. The cubic root of 121515069 is about 495.3095625131.

The spelling of 121515069 in words is "one hundred twenty-one million, five hundred fifteen thousand, sixty-nine".