1231031303133 has 16 divisors (see below), whose sum is σ = 1647430811136. Its totient is φ = 817660134720.

The previous prime is 1231031303111. The next prime is 1231031303147. The reversal of 1231031303133 is 3313031301321.

It is not a de Polignac number, because 1231031303133 - 2⁶ = 1231031303069 is a prime.

It is a super-4 number, since 4×1231031303133⁴ (a number of 49 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231031303233) 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, 11940835 + ... + 12043487.

It is an arithmetic number, because the mean of its divisors is an integer number (102964425696).

Almost surely, 2^{1231031303133} is an apocalyptic number.

It is an amenable number.

1231031303133 is a deficient number, since it is larger than the sum of its proper divisors (416399508003).

1231031303133 is a wasteful number, since it uses less digits than its factorization.

1231031303133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117364.

The product of its (nonzero) digits is 1458, while the sum is 24.

Adding to 1231031303133 its reverse (3313031301321), we get a palindrome (4544062604454).

The spelling of 1231031303133 in words is "one trillion, two hundred thirty-one billion, thirty-one million, three hundred three thousand, one hundred thirty-three".