22113321221 has 2 divisors, whose sum is σ = 22113321222. Its totient is φ = 22113321220.

The previous prime is 22113321179. The next prime is 22113321253. The reversal of 22113321221 is 12212331122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12879072196 + 9234249025 = 113486^2 + 96095^2 .

It is a cyclic number.

It is not a de Polignac number, because 22113321221 - 2⁶ = 22113321157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22113321193 and 22113321202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22113321271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11056660610 + 11056660611.

It is an arithmetic number, because the mean of its divisors is an integer number (11056660611).

Almost surely, 2^22113321221 is an apocalyptic number.

It is an amenable number.

22113321221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22113321221 is an equidigital number, since it uses as much as digits as its factorization.

22113321221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 20.

Adding to 22113321221 its reverse (12212331122), we get a palindrome (34325652343).

Subtracting from 22113321221 its reverse (12212331122), we obtain a palindrome (9900990099).

The spelling of 22113321221 in words is "twenty-two billion, one hundred thirteen million, three hundred twenty-one thousand, two hundred twenty-one".