1231442501136 has 40 divisors (see below), whose sum is σ = 3182011097184. Its totient is φ = 410379590400.

The previous prime is 1231442501129. The next prime is 1231442501147. The reversal of 1231442501136 is 6311052441321.

It is a super-2 number, since 2×1231442501136² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231442501097 and 1231442501106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2967090 + ... + 3356561.

Almost surely, 2^{1231442501136} is an apocalyptic number.

1231442501136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1231442501136 is an abundant number, since it is smaller than the sum of its proper divisors (1950568596048).

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

1231442501136 is a wasteful number, since it uses less digits than its factorization.

1231442501136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6327719 (or 6327713 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 1231442501136 its reverse (6311052441321), we get a palindrome (7542494942457).

The spelling of 1231442501136 in words is "one trillion, two hundred thirty-one billion, four hundred forty-two million, five hundred one thousand, one hundred thirty-six".