121421115 has 96 divisors (see below), whose sum is σ = 235872000. Its totient is φ = 57528576.

The previous prime is 121421107. The next prime is 121421129. The reversal of 121421115 is 511124121.

It is not a de Polignac number, because 121421115 - 2³ = 121421107 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1462864 + ... + 1462946.

It is an arithmetic number, because the mean of its divisors is an integer number (2457000).

Almost surely, 2^121421115 is an apocalyptic number.

121421115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121421115 is a deficient number, since it is larger than the sum of its proper divisors (114450885).

121421115 is a wasteful number, since it uses less digits than its factorization.

121421115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 198 counting only the distinct ones).

The product of its digits is 80, while the sum is 18.

The square root of 121421115 is about 11019.1249652593. The cubic root of 121421115 is about 495.1818737857.

Adding to 121421115 its reverse (511124121), we get a palindrome (632545236).

The spelling of 121421115 in words is "one hundred twenty-one million, four hundred twenty-one thousand, one hundred fifteen".