116515121 has 4 divisors (see below), whose sum is σ = 116656500. Its totient is φ = 116373744.

The previous prime is 116515103. The next prime is 116515177. The reversal of 116515121 is 121515611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121515611 = 7 ⋅17359373.

It can be written as a sum of positive squares in 2 ways, for example, as 36663025 + 79852096 = 6055^2 + 8936^2 .

It is a cyclic number.

It is not a de Polignac number, because 116515121 - 2¹⁴ = 116498737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116515181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69446 + ... + 71103.

It is an arithmetic number, because the mean of its divisors is an integer number (29164125).

Almost surely, 2^116515121 is an apocalyptic number.

It is an amenable number.

116515121 is a deficient number, since it is larger than the sum of its proper divisors (141379).

116515121 is an equidigital number, since it uses as much as digits as its factorization.

116515121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141378.

The product of its digits is 300, while the sum is 23.

The square root of 116515121 is about 10794.2170165325. The cubic root of 116515121 is about 488.4207395045.

The spelling of 116515121 in words is "one hundred sixteen million, five hundred fifteen thousand, one hundred twenty-one".