121355432241 has 16 divisors (see below), whose sum is σ = 162221640000. Its totient is φ = 80696605248.

The previous prime is 121355432189. The next prime is 121355432257. The reversal of 121355432241 is 142234553121.

It is not a de Polignac number, because 121355432241 - 2¹³ = 121355424049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121355432281) 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, 2788275 + ... + 2831463.

It is an arithmetic number, because the mean of its divisors is an integer number (10138852500).

Almost surely, 2^121355432241 is an apocalyptic number.

It is an amenable number.

121355432241 is a deficient number, since it is larger than the sum of its proper divisors (40866207759).

121355432241 is a wasteful number, since it uses less digits than its factorization.

121355432241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45568.

The product of its digits is 28800, while the sum is 33.

Adding to 121355432241 its reverse (142234553121), we get a palindrome (263589985362).

The spelling of 121355432241 in words is "one hundred twenty-one billion, three hundred fifty-five million, four hundred thirty-two thousand, two hundred forty-one".