121644135241 has 16 divisors (see below), whose sum is σ = 123895820160. Its totient is φ = 119409655680.

The previous prime is 121644135181. The next prime is 121644135259. The reversal of 121644135241 is 142531446121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121644135241 - 2²³ = 121635746633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121644135197 and 121644135206.

It is not an unprimeable number, because it can be changed into a prime (121644135941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13912131 + ... + 13920871.

It is an arithmetic number, because the mean of its divisors is an integer number (7743488760).

Almost surely, 2^121644135241 is an apocalyptic number.

It is an amenable number.

121644135241 is a deficient number, since it is larger than the sum of its proper divisors (2251684919).

121644135241 is an equidigital number, since it uses as much as digits as its factorization.

121644135241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9696.

The product of its digits is 23040, while the sum is 34.

The spelling of 121644135241 in words is "one hundred twenty-one billion, six hundred forty-four million, one hundred thirty-five thousand, two hundred forty-one".