1111221103231 has 4 divisors (see below), whose sum is σ = 1111295115792. Its totient is φ = 1111147090672.

The previous prime is 1111221103211. The next prime is 1111221103247. The reversal of 1111221103231 is 1323011221111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111221103231 is a prime.

It is a super-2 number, since 2×1111221103231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111221103199 and 1111221103208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111221103211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36983755 + ... + 37013788.

It is an arithmetic number, because the mean of its divisors is an integer number (277823778948).

Almost surely, 2^{1111221103231} is an apocalyptic number.

1111221103231 is a deficient number, since it is larger than the sum of its proper divisors (74012561).

1111221103231 is an equidigital number, since it uses as much as digits as its factorization.

1111221103231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74012560.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1111221103231 its reverse (1323011221111), we get a palindrome (2434232324342).

The spelling of 1111221103231 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred three thousand, two hundred thirty-one".