123131313232 has 10 divisors (see below), whose sum is σ = 238566919418. Its totient is φ = 61565656608.

The previous prime is 123131313223. The next prime is 123131313233. The reversal of 123131313232 is 232313131321.

It can be written as a sum of positive squares in only one way, i.e., 92807966736 + 30323346496 = 304644^2 + 174136^2 .

It is a super-2 number, since 2×123131313232² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123131313197 and 123131313206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123131313233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3847853523 + ... + 3847853554.

Almost surely, 2^123131313232 is an apocalyptic number.

It is an amenable number.

123131313232 is a deficient number, since it is larger than the sum of its proper divisors (115435606186).

123131313232 is an equidigital number, since it uses as much as digits as its factorization.

123131313232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7695707085 (or 7695707079 counting only the distinct ones).

The product of its digits is 1944, while the sum is 25.

Adding to 123131313232 its reverse (232313131321), we get a palindrome (355444444553).

The spelling of 123131313232 in words is "one hundred twenty-three billion, one hundred thirty-one million, three hundred thirteen thousand, two hundred thirty-two".