13431140121 has 32 divisors (see below), whose sum is σ = 20741529600. Its totient is φ = 7572398400.

The previous prime is 13431140117. The next prime is 13431140153. The reversal of 13431140121 is 12104113431.

13431140121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13431140121 - 2² = 13431140117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (13431140101) 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 31 ways as a sum of consecutive naturals, for example, 534796 + ... + 559346.

It is an arithmetic number, because the mean of its divisors is an integer number (648172800).

Almost surely, 2^13431140121 is an apocalyptic number.

It is an amenable number.

13431140121 is a deficient number, since it is larger than the sum of its proper divisors (7310389479).

13431140121 is a wasteful number, since it uses less digits than its factorization.

13431140121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24909.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 13431140121 its reverse (12104113431), we get a palindrome (25535253552).

The spelling of 13431140121 in words is "thirteen billion, four hundred thirty-one million, one hundred forty thousand, one hundred twenty-one".