121403224 has 8 divisors (see below), whose sum is σ = 227631060. Its totient is φ = 60701608.

The previous prime is 121403221. The next prime is 121403267. The reversal of 121403224 is 422304121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121403221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7587694 + ... + 7587709.

Almost surely, 2^121403224 is an apocalyptic number.

It is an amenable number.

121403224 is a deficient number, since it is larger than the sum of its proper divisors (106227836).

121403224 is a wasteful number, since it uses less digits than its factorization.

121403224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15175409 (or 15175405 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 121403224 is about 11018.3131195297. The cubic root of 121403224 is about 495.1575514536.

Adding to 121403224 its reverse (422304121), we get a palindrome (543707345).

The spelling of 121403224 in words is "one hundred twenty-one million, four hundred three thousand, two hundred twenty-four".