121181115 has 16 divisors (see below), whose sum is σ = 211516416. Its totient is φ = 58754400.

The previous prime is 121181063. The next prime is 121181131. The reversal of 121181115 is 511181121.

It is not a de Polignac number, because 121181115 - 2⁶ = 121181051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121181091 and 121181100.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367051 + ... + 367380.

It is an arithmetic number, because the mean of its divisors is an integer number (13219776).

Almost surely, 2^121181115 is an apocalyptic number.

121181115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121181115 is a deficient number, since it is larger than the sum of its proper divisors (90335301).

121181115 is a wasteful number, since it uses less digits than its factorization.

121181115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734450.

The product of its digits is 80, while the sum is 21.

The square root of 121181115 is about 11008.2294216645. The cubic root of 121181115 is about 494.8554010861.

The spelling of 121181115 in words is "one hundred twenty-one million, one hundred eighty-one thousand, one hundred fifteen".