1221332112223 has 4 divisors (see below), whose sum is σ = 1251120700368. Its totient is φ = 1191543524080.

The previous prime is 1221332112193. The next prime is 1221332112227. The reversal of 1221332112223 is 3222112331221.

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

It is a cyclic number.

It is not a de Polignac number, because 1221332112223 - 2⁹ = 1221332111711 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 (1221332112227) 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, 14894294011 + ... + 14894294092.

It is an arithmetic number, because the mean of its divisors is an integer number (312780175092).

Almost surely, 2^{1221332112223} is an apocalyptic number.

1221332112223 is a deficient number, since it is larger than the sum of its proper divisors (29788588145).

1221332112223 is an equidigital number, since it uses as much as digits as its factorization.

1221332112223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29788588144.

The product of its digits is 1728, while the sum is 25.

Adding to 1221332112223 its reverse (3222112331221), we get a palindrome (4443444443444).

The spelling of 1221332112223 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-two million, one hundred twelve thousand, two hundred twenty-three".