121505204 has 6 divisors (see below), whose sum is σ = 212634114. Its totient is φ = 60752600.

The previous prime is 121505191. The next prime is 121505227. The reversal of 121505204 is 402505121.

It can be written as a sum of positive squares in only one way, i.e., 97022500 + 24482704 = 9850^2 + 4948^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15188147 + ... + 15188154.

It is an arithmetic number, because the mean of its divisors is an integer number (35439019).

Almost surely, 2^121505204 is an apocalyptic number.

It is an amenable number.

121505204 is a deficient number, since it is larger than the sum of its proper divisors (91128910).

121505204 is a wasteful number, since it uses less digits than its factorization.

121505204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30376305 (or 30376303 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 121505204 is about 11022.9398982304. The cubic root of 121505204 is about 495.2961585211.

The spelling of 121505204 in words is "one hundred twenty-one million, five hundred five thousand, two hundred four".