23221013221 has 16 divisors (see below), whose sum is σ = 27144390400. Its totient is φ = 19856324880.

The previous prime is 23221013219. The next prime is 23221013227. The reversal of 23221013221 is 12231012232.

It is not a de Polignac number, because 23221013221 - 2¹ = 23221013219 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 (23221013227) 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, 64000 + ... + 224806.

It is an arithmetic number, because the mean of its divisors is an integer number (1696524400).

Almost surely, 2^23221013221 is an apocalyptic number.

It is an amenable number.

23221013221 is a deficient number, since it is larger than the sum of its proper divisors (3923377179).

23221013221 is an equidigital number, since it uses as much as digits as its factorization.

23221013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161249 (or 161235 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 23221013221 its reverse (12231012232), we get a palindrome (35452025453).

The spelling of 23221013221 in words is "twenty-three billion, two hundred twenty-one million, thirteen thousand, two hundred twenty-one".