121155224 has 8 divisors (see below), whose sum is σ = 227166060. Its totient is φ = 60577608.

The previous prime is 121155193. The next prime is 121155227. The reversal of 121155224 is 422551121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 121155224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121155227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7572194 + ... + 7572209.

Almost surely, 2^121155224 is an apocalyptic number.

It is an amenable number.

121155224 is a deficient number, since it is larger than the sum of its proper divisors (106010836).

121155224 is a wasteful number, since it uses less digits than its factorization.

121155224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15144409 (or 15144405 counting only the distinct ones).

The product of its digits is 800, while the sum is 23.

The square root of 121155224 is about 11007.0533749955. The cubic root of 121155224 is about 494.8201557325.

The spelling of 121155224 in words is "one hundred twenty-one million, one hundred fifty-five thousand, two hundred twenty-four".