1223331320221 has 16 divisors (see below), whose sum is σ = 1288989000000. Its totient is φ = 1157801371776.

The previous prime is 1223331320191. The next prime is 1223331320269. The reversal of 1223331320221 is 1220231333221.

It is not a de Polignac number, because 1223331320221 - 2¹³ = 1223331312029 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 (1223331320291) 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, 136391025 + ... + 136399993.

It is an arithmetic number, because the mean of its divisors is an integer number (80561812500).

Almost surely, 2^{1223331320221} is an apocalyptic number.

It is an amenable number.

1223331320221 is a deficient number, since it is larger than the sum of its proper divisors (65657679779).

1223331320221 is a wasteful number, since it uses less digits than its factorization.

1223331320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15276.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1223331320221 its reverse (1220231333221), we get a palindrome (2443562653442).

The spelling of 1223331320221 in words is "one trillion, two hundred twenty-three billion, three hundred thirty-one million, three hundred twenty thousand, two hundred twenty-one".