121405104 has 30 divisors (see below), whose sum is σ = 339766076. Its totient is φ = 40468320.

The previous prime is 121405093. The next prime is 121405121. The reversal of 121405104 is 401504121.

121405104 is a `hidden beast` number, since 12 + 140 + 510 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 421402 + ... + 421689.

Almost surely, 2^121405104 is an apocalyptic number.

It is an amenable number.

121405104 is an abundant number, since it is smaller than the sum of its proper divisors (218360972).

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

121405104 is a wasteful number, since it uses less digits than its factorization.

121405104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843105 (or 843096 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 121405104 is about 11018.3984317141. The cubic root of 121405104 is about 495.1601073752.

Adding to 121405104 its reverse (401504121), we get a palindrome (522909225).

The spelling of 121405104 in words is "one hundred twenty-one million, four hundred five thousand, one hundred four".