1322220400221 has 16 divisors (see below), whose sum is σ = 2018209716864. Its totient is φ = 754280385024.

The previous prime is 1322220400211. The next prime is 1322220400243. The reversal of 1322220400221 is 1220040222231.

It is not a de Polignac number, because 1322220400221 - 2¹³ = 1322220392029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322220400211) 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, 53075976 + ... + 53100881.

It is an arithmetic number, because the mean of its divisors is an integer number (126138107304).

Almost surely, 2^{1322220400221} is an apocalyptic number.

It is an amenable number.

1322220400221 is a deficient number, since it is larger than the sum of its proper divisors (695989316643).

1322220400221 is a wasteful number, since it uses less digits than its factorization.

1322220400221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106177460.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 1322220400221 its reverse (1220040222231), we get a palindrome (2542260622452).

The spelling of 1322220400221 in words is "one trillion, three hundred twenty-two billion, two hundred twenty million, four hundred thousand, two hundred twenty-one".