121641135 has 128 divisors (see below), whose sum is σ = 267632640. Its totient is φ = 45619200.

The previous prime is 121641127. The next prime is 121641199. The reversal of 121641135 is 531146121.

It is a happy number.

It is not a de Polignac number, because 121641135 - 2³ = 121641127 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 504615 + ... + 504855.

It is an arithmetic number, because the mean of its divisors is an integer number (2090880).

Almost surely, 2^121641135 is an apocalyptic number.

121641135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121641135 is an abundant number, since it is smaller than the sum of its proper divisors (145991505).

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

121641135 is a wasteful number, since it uses less digits than its factorization.

121641135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309.

The product of its digits is 720, while the sum is 24.

The square root of 121641135 is about 11029.1039980590. The cubic root of 121641135 is about 495.4807898757.

Adding to 121641135 its reverse (531146121), we get a palindrome (652787256).

The spelling of 121641135 in words is "one hundred twenty-one million, six hundred forty-one thousand, one hundred thirty-five".