1231111121300 has 72 divisors (see below), whose sum is σ = 2691779798400. Its totient is φ = 488720517120.

The previous prime is 1231111121297. The next prime is 1231111121309. The reversal of 1231111121300 is 31211111321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231111121309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8010581 + ... + 8162819.

Almost surely, 2^{1231111121300} is an apocalyptic number.

1231111121300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231111121300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1345889899200).

1231111121300 is an abundant number, since it is smaller than the sum of its proper divisors (1460668677100).

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

1231111121300 is a wasteful number, since it uses less digits than its factorization.

1231111121300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152865 (or 152858 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 1231111121300 its reverse (31211111321), we get a palindrome (1262322232621).

The spelling of 1231111121300 in words is "one trillion, two hundred thirty-one billion, one hundred eleven million, one hundred twenty-one thousand, three hundred".