12231231145 has 16 divisors (see below), whose sum is σ = 17760981888. Its totient is φ = 7893768960.

The previous prime is 12231231121. The next prime is 12231231149. The reversal of 12231231145 is 54113213221.

It is not a de Polignac number, because 12231231145 - 2⁹ = 12231230633 is a prime.

It is a super-2 number, since 2×12231231145² (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 (12231231149) 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, 10277751 + ... + 10278940.

It is an arithmetic number, because the mean of its divisors is an integer number (1110061368).

Almost surely, 2^12231231145 is an apocalyptic number.

It is an amenable number.

12231231145 is a deficient number, since it is larger than the sum of its proper divisors (5529750743).

12231231145 is a wasteful number, since it uses less digits than its factorization.

12231231145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20556720.

The product of its digits is 1440, while the sum is 25.

Adding to 12231231145 its reverse (54113213221), we get a palindrome (66344444366).

The spelling of 12231231145 in words is "twelve billion, two hundred thirty-one million, two hundred thirty-one thousand, one hundred forty-five".