1231011033203 has 6 divisors (see below), whose sum is σ = 1431992426436. Its totient is φ = 1055152314132.

The previous prime is 1231011033179. The next prime is 1231011033229. The reversal of 1231011033203 is 3023301101321.

It is not a de Polignac number, because 1231011033203 - 2²⁰ = 1231009984627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231011033403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12561337025 + ... + 12561337122.

It is an arithmetic number, because the mean of its divisors is an integer number (238665404406).

Almost surely, 2^{1231011033203} is an apocalyptic number.

1231011033203 is a deficient number, since it is larger than the sum of its proper divisors (200981393233).

1231011033203 is an equidigital number, since it uses as much as digits as its factorization.

1231011033203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25122674161 (or 25122674154 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 1231011033203 its reverse (3023301101321), we get a palindrome (4254312134524).

The spelling of 1231011033203 in words is "one trillion, two hundred thirty-one billion, eleven million, thirty-three thousand, two hundred three".