121491225 has 48 divisors (see below), whose sum is σ = 234955200. Its totient is φ = 61378560.

The previous prime is 121491203. The next prime is 121491229. The reversal of 121491225 is 522194121.

It is not a de Polignac number, because 121491225 - 2⁸ = 121490969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (121491229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8089 + ... + 17561.

It is an arithmetic number, because the mean of its divisors is an integer number (4894900).

Almost surely, 2^121491225 is an apocalyptic number.

121491225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121491225 is a deficient number, since it is larger than the sum of its proper divisors (113463975).

121491225 is a wasteful number, since it uses less digits than its factorization.

121491225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9511 (or 9500 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 121491225 is about 11022.3057932540. The cubic root of 121491225 is about 495.2771634210.

The spelling of 121491225 in words is "one hundred twenty-one million, four hundred ninety-one thousand, two hundred twenty-five".