121225402 has 16 divisors (see below), whose sum is σ = 192753000. Its totient is φ = 56982528.

The previous prime is 121225399. The next prime is 121225411. The reversal of 121225402 is 204522121.

It can be written as a sum of positive squares in 4 ways, for example, as 120099681 + 1125721 = 10959^2 + 1061^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121225402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42724 + ... + 45472.

Almost surely, 2^121225402 is an apocalyptic number.

121225402 is a deficient number, since it is larger than the sum of its proper divisors (71527598).

121225402 is a wasteful number, since it uses less digits than its factorization.

121225402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 121225402 is about 11010.2407784753. The cubic root of 121225402 is about 494.9156772326.

Adding to 121225402 its reverse (204522121), we get a palindrome (325747523).

The spelling of 121225402 in words is "one hundred twenty-one million, two hundred twenty-five thousand, four hundred two".