121631135 has 8 divisors (see below), whose sum is σ = 150665856. Its totient is φ = 94165920.

The previous prime is 121631129. The next prime is 121631137. The reversal of 121631135 is 531136121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121631135 - 2⁶ = 121631071 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 121631135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121631137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392204 + ... + 392513.

It is an arithmetic number, because the mean of its divisors is an integer number (18833232).

Almost surely, 2^121631135 is an apocalyptic number.

121631135 is a deficient number, since it is larger than the sum of its proper divisors (29034721).

121631135 is an equidigital number, since it uses as much as digits as its factorization.

121631135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784753.

The product of its digits is 540, while the sum is 23.

The square root of 121631135 is about 11028.6506427577. The cubic root of 121631135 is about 495.4672118382.

Adding to 121631135 its reverse (531136121), we get a palindrome (652767256).

The spelling of 121631135 in words is "one hundred twenty-one million, six hundred thirty-one thousand, one hundred thirty-five".