1111320231231 has 12 divisors (see below), whose sum is σ = 1723680358872. Its totient is φ = 635040132048.

The previous prime is 1111320231223. The next prime is 1111320231247. The reversal of 1111320231231 is 1321320231111.

It is not a de Polignac number, because 1111320231231 - 2³ = 1111320231223 is a prime.

It is a super-2 number, since 2×1111320231231² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1111320231198 and 1111320231207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111320231031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3780000640 + ... + 3780000933.

It is an arithmetic number, because the mean of its divisors is an integer number (143640029906).

Almost surely, 2^{1111320231231} is an apocalyptic number.

1111320231231 is a deficient number, since it is larger than the sum of its proper divisors (612360127641).

1111320231231 is an equidigital number, since it uses as much as digits as its factorization.

1111320231231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7560001590 (or 7560001583 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1111320231231 its reverse (1321320231111), we get a palindrome (2432640462342).

The spelling of 1111320231231 in words is "one trillion, one hundred eleven billion, three hundred twenty million, two hundred thirty-one thousand, two hundred thirty-one".