1223312133221 has 4 divisors (see below), whose sum is σ = 1223319147372. Its totient is φ = 1223305119072.

The previous prime is 1223312133217. The next prime is 1223312133257.

1223312133221 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 281577748321 + 941734384900 = 530639^2 + 970430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223312133221 - 2² = 1223312133217 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 (1223312133521) 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, 3238616 + ... + 3596561.

It is an arithmetic number, because the mean of its divisors is an integer number (305829786843).

Almost surely, 2^{1223312133221} is an apocalyptic number.

It is an amenable number.

1223312133221 is a deficient number, since it is larger than the sum of its proper divisors (7014151).

1223312133221 is an equidigital number, since it uses as much as digits as its factorization.

1223312133221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7014150.

The product of its digits is 2592, while the sum is 26.

The spelling of 1223312133221 in words is "one trillion, two hundred twenty-three billion, three hundred twelve million, one hundred thirty-three thousand, two hundred twenty-one".