13431421123 has 16 divisors (see below), whose sum is σ = 13750450560. Its totient is φ = 13117095936.

The previous prime is 13431421111. The next prime is 13431421127. The reversal of 13431421123 is 32112413431.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13431421123 is a prime.

It is a super-2 number, since 2×13431421123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13431421127) 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, 2714790 + ... + 2719732.

It is an arithmetic number, because the mean of its divisors is an integer number (859403160).

Almost surely, 2^13431421123 is an apocalyptic number.

13431421123 is a deficient number, since it is larger than the sum of its proper divisors (319029437).

13431421123 is a wasteful number, since it uses less digits than its factorization.

13431421123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5406.

The product of its digits is 1728, while the sum is 25.

Adding to 13431421123 its reverse (32112413431), we get a palindrome (45543834554).

The spelling of 13431421123 in words is "thirteen billion, four hundred thirty-one million, four hundred twenty-one thousand, one hundred twenty-three".