12431121145 has 8 divisors (see below), whose sum is σ = 14918850504. Its totient is φ = 9943893504.

The previous prime is 12431121137. The next prime is 12431121149. The reversal of 12431121145 is 54112113421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 62789776 + 12368331369 = 7924^2 + 111213^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12431121145 - 2³ = 12431121137 is a prime.

It is a super-2 number, since 2×12431121145² (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 (12431121149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68574 + ... + 171943.

It is an arithmetic number, because the mean of its divisors is an integer number (1864856313).

Almost surely, 2^12431121145 is an apocalyptic number.

It is an amenable number.

12431121145 is a deficient number, since it is larger than the sum of its proper divisors (2487729359).

12431121145 is a wasteful number, since it uses less digits than its factorization.

12431121145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250859.

The product of its digits is 960, while the sum is 25.

Adding to 12431121145 its reverse (54112113421), we get a palindrome (66543234566).

The spelling of 12431121145 in words is "twelve billion, four hundred thirty-one million, one hundred twenty-one thousand, one hundred forty-five".