121913225 has 36 divisors (see below), whose sum is σ = 183541824. Its totient is φ = 79944480.

The previous prime is 121913219. The next prime is 121913227. The reversal of 121913225 is 522319121.

It is a happy number.

It is not a de Polignac number, because 121913225 - 2⁸ = 121912969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121913194 and 121913203.

It is not an unprimeable number, because it can be changed into a prime (121913227) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 26012 + ... + 30338.

It is an arithmetic number, because the mean of its divisors is an integer number (5098384).

Almost surely, 2^121913225 is an apocalyptic number.

It is an amenable number.

121913225 is a deficient number, since it is larger than the sum of its proper divisors (61628599).

121913225 is a wasteful number, since it uses less digits than its factorization.

121913225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4374 (or 4362 counting only the distinct ones).

The product of its digits is 1080, while the sum is 26.

The square root of 121913225 is about 11041.4321987684. The cubic root of 121913225 is about 495.8499494624.

The spelling of 121913225 in words is "one hundred twenty-one million, nine hundred thirteen thousand, two hundred twenty-five".