121431115424 has 12 divisors (see below), whose sum is σ = 239067508554. Its totient is φ = 60715557696.

The previous prime is 121431115417. The next prime is 121431115439. The reversal of 121431115424 is 424511134121.

121431115424 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 110710583824 + 10720531600 = 332732^2 + 103540^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1897361147 + ... + 1897361210.

Almost surely, 2^121431115424 is an apocalyptic number.

It is an amenable number.

121431115424 is a deficient number, since it is larger than the sum of its proper divisors (117636393130).

121431115424 is an equidigital number, since it uses as much as digits as its factorization.

121431115424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3794722367 (or 3794722359 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

Adding to 121431115424 its reverse (424511134121), we get a palindrome (545942249545).

The spelling of 121431115424 in words is "one hundred twenty-one billion, four hundred thirty-one million, one hundred fifteen thousand, four hundred twenty-four".