1223204023221 has 16 divisors (see below), whose sum is σ = 1633371834048. Its totient is φ = 814253241600.

The previous prime is 1223204023211. The next prime is 1223204023241.

1223204023221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1223204023221 - 2⁵ = 1223204023189 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1223204023191 and 1223204023200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223204023201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11091411 + ... + 11201151.

It is an arithmetic number, because the mean of its divisors is an integer number (102085739628).

Almost surely, 2^{1223204023221} is an apocalyptic number.

It is an amenable number.

1223204023221 is a deficient number, since it is larger than the sum of its proper divisors (410167810827).

1223204023221 is a wasteful number, since it uses less digits than its factorization.

1223204023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115252.

The product of its (nonzero) digits is 2304, while the sum is 24.

The spelling of 1223204023221 in words is "one trillion, two hundred twenty-three billion, two hundred four million, twenty-three thousand, two hundred twenty-one".