111223310221 has 4 divisors (see below), whose sum is σ = 111224138944. Its totient is φ = 111222481500.

The previous prime is 111223310173. The next prime is 111223310251. The reversal of 111223310221 is 122013322111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 111223310221 - 2¹⁵ = 111223277453 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 (111223310251) 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, 161685 + ... + 498586.

It is an arithmetic number, because the mean of its divisors is an integer number (27806034736).

Almost surely, 2^111223310221 is an apocalyptic number.

It is an amenable number.

111223310221 is a deficient number, since it is larger than the sum of its proper divisors (828723).

111223310221 is an equidigital number, since it uses as much as digits as its factorization.

111223310221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828722.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 111223310221 its reverse (122013322111), we get a palindrome (233236632332).

The spelling of 111223310221 in words is "one hundred eleven billion, two hundred twenty-three million, three hundred ten thousand, two hundred twenty-one".