121404135 has 16 divisors (see below), whose sum is σ = 194640480. Its totient is φ = 64617600.

The previous prime is 121404131. The next prime is 121404181. The reversal of 121404135 is 531404121.

It is not a de Polignac number, because 121404135 - 2² = 121404131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121404131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316 + ... + 15585.

It is an arithmetic number, because the mean of its divisors is an integer number (12165030).

Almost surely, 2^121404135 is an apocalyptic number.

121404135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121404135 is a deficient number, since it is larger than the sum of its proper divisors (73236345).

121404135 is a wasteful number, since it uses less digits than its factorization.

121404135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16418.

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

The square root of 121404135 is about 11018.3544597186. The cubic root of 121404135 is about 495.1587899913.

Adding to 121404135 its reverse (531404121), we get a palindrome (652808256).

The spelling of 121404135 in words is "one hundred twenty-one million, four hundred four thousand, one hundred thirty-five".