123133131012 has 24 divisors (see below), whose sum is σ = 290947484800. Its totient is φ = 40524827616.

The previous prime is 123133130959. The next prime is 123133131013. The reversal of 123133131012 is 210131331321.

It is a happy number.

It is a super-2 number, since 2×123133131012² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123133131012.

It is not an unprimeable number, because it can be changed into a prime (123133131013) 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, 64942687 + ... + 64944582.

Almost surely, 2^123133131012 is an apocalyptic number.

123133131012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123133131012 is an abundant number, since it is smaller than the sum of its proper divisors (167814353788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123133131012 is a wasteful number, since it uses less digits than its factorization.

123133131012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129887355 (or 129887353 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 123133131012 its reverse (210131331321), we get a palindrome (333264462333).

The spelling of 123133131012 in words is "one hundred twenty-three billion, one hundred thirty-three million, one hundred thirty-one thousand, twelve".