1223222223221 has 16 divisors (see below), whose sum is σ = 1264234126848. Its totient is φ = 1182784680000.

The previous prime is 1223222223187. The next prime is 1223222223263.

1223222223221 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1223222223221 - 2¹⁰ = 1223222222197 is a prime.

It is a super-2 number, since 2×1223222223221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223222223281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42985820 + ... + 43014266.

It is an arithmetic number, because the mean of its divisors is an integer number (79014632928).

Almost surely, 2^{1223222223221} is an apocalyptic number.

It is an amenable number.

1223222223221 is a deficient number, since it is larger than the sum of its proper divisors (41011903627).

1223222223221 is a wasteful number, since it uses less digits than its factorization.

1223222223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38492.

The product of its digits is 4608, while the sum is 26.

The spelling of 1223222223221 in words is "one trillion, two hundred twenty-three billion, two hundred twenty-two million, two hundred twenty-three thousand, two hundred twenty-one".