1111323312221 has 16 divisors (see below), whose sum is σ = 1139767200000. Its totient is φ = 1083276370176.

The previous prime is 1111323312181. The next prime is 1111323312361. The reversal of 1111323312221 is 1222133231111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1111323312221 - 2⁶ = 1111323312157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111323311221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4513505 + ... + 4753353.

It is an arithmetic number, because the mean of its divisors is an integer number (71235450000).

Almost surely, 2^{1111323312221} is an apocalyptic number.

It is an amenable number.

1111323312221 is a deficient number, since it is larger than the sum of its proper divisors (28443887779).

1111323312221 is an equidigital number, since it uses as much as digits as its factorization.

1111323312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240676.

The product of its digits is 432, while the sum is 23.

Adding to 1111323312221 its reverse (1222133231111), we get a palindrome (2333456543332).

The spelling of 1111323312221 in words is "one trillion, one hundred eleven billion, three hundred twenty-three million, three hundred twelve thousand, two hundred twenty-one".