1231303311100 has 18 divisors (see below), whose sum is σ = 2671928185304. Its totient is φ = 492521324400.

The previous prime is 1231303311059. The next prime is 1231303311107. The reversal of 1231303311100 is 11133031321.

It is a super-2 number, since 2×1231303311100² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231303311107) 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, 6156516456 + ... + 6156516655.

Almost surely, 2^{1231303311100} is an apocalyptic number.

1231303311100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231303311100 is an abundant number, since it is smaller than the sum of its proper divisors (1440624874204).

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

1231303311100 is a wasteful number, since it uses less digits than its factorization.

1231303311100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12313033125 (or 12313033118 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 1231303311100 its reverse (11133031321), we get a palindrome (1242436342421).

The spelling of 1231303311100 in words is "one trillion, two hundred thirty-one billion, three hundred three million, three hundred eleven thousand, one hundred".