1223221112213 has 4 divisors (see below), whose sum is σ = 1238704923840. Its totient is φ = 1207737300588.

The previous prime is 1223221112189. The next prime is 1223221112219. The reversal of 1223221112213 is 3122111223221.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223221112213 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 (1223221112219) 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, 7741905695 + ... + 7741905852.

It is an arithmetic number, because the mean of its divisors is an integer number (309676230960).

Almost surely, 2^{1223221112213} is an apocalyptic number.

It is an amenable number.

1223221112213 is a deficient number, since it is larger than the sum of its proper divisors (15483811627).

1223221112213 is an equidigital number, since it uses as much as digits as its factorization.

1223221112213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15483811626.

The product of its digits is 576, while the sum is 23.

Adding to 1223221112213 its reverse (3122111223221), we get a palindrome (4345332335434).

The spelling of 1223221112213 in words is "one trillion, two hundred twenty-three billion, two hundred twenty-one million, one hundred twelve thousand, two hundred thirteen".