121205604 has 48 divisors (see below), whose sum is σ = 305531072. Its totient is φ = 37176192.

The previous prime is 121205573. The next prime is 121205611. The reversal of 121205604 is 406502121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57147 + ... + 59229.

Almost surely, 2^121205604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121205604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152765536).

121205604 is an abundant number, since it is smaller than the sum of its proper divisors (184325468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121205604 is a wasteful number, since it uses less digits than its factorization.

121205604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476 (or 2474 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 121205604 is about 11009.3416696912. The cubic root of 121205604 is about 494.8887332812. Note that the first 3 decimals are identical.

Adding to 121205604 its reverse (406502121), we get a palindrome (527707725).

The spelling of 121205604 in words is "one hundred twenty-one million, two hundred five thousand, six hundred four".