121355432224 has 24 divisors (see below), whose sum is σ = 257296854780. Its totient is φ = 56010199296.

The previous prime is 121355432189. The next prime is 121355432257. The reversal of 121355432224 is 422234553121.

It can be written as a sum of positive squares in 2 ways, for example, as 121335182224 + 20250000 = 348332^2 + 4500^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121355432224.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145859479 + ... + 145860310.

Almost surely, 2^121355432224 is an apocalyptic number.

It is an amenable number.

121355432224 is an abundant number, since it is smaller than the sum of its proper divisors (135941422556).

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

121355432224 is a wasteful number, since it uses less digits than its factorization.

121355432224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291719812 (or 291719804 counting only the distinct ones).

The product of its digits is 57600, while the sum is 34.

Adding to 121355432224 its reverse (422234553121), we get a palindrome (543589985345).

The spelling of 121355432224 in words is "one hundred twenty-one billion, three hundred fifty-five million, four hundred thirty-two thousand, two hundred twenty-four".