1223426243221 has 16 divisors (see below), whose sum is σ = 1520663856768. Its totient is φ = 958401576000.

The previous prime is 1223426243209. The next prime is 1223426243267.

1223426243221 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1223426243221 - 2⁷ = 1223426243093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223426243021) 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, 66546475 + ... + 66564856.

It is an arithmetic number, because the mean of its divisors is an integer number (95041491048).

Almost surely, 2^{1223426243221} is an apocalyptic number.

It is an amenable number.

1223426243221 is a deficient number, since it is larger than the sum of its proper divisors (297237613547).

1223426243221 is a wasteful number, since it uses less digits than its factorization.

1223426243221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133111452.

The product of its digits is 55296, while the sum is 34.

The spelling of 1223426243221 in words is "one trillion, two hundred twenty-three billion, four hundred twenty-six million, two hundred forty-three thousand, two hundred twenty-one".