22220101112221 has 2 divisors, whose sum is σ = 22220101112222. Its totient is φ = 22220101112220.

The previous prime is 22220101112197. The next prime is 22220101112227. The reversal of 22220101112221 is 12221110102222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13885684322500 + 8334416789721 = 3726350^2 + 2886939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22220101112221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22220101112227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110050556110 + 11110050556111.

It is an arithmetic number, because the mean of its divisors is an integer number (11110050556111).

Almost surely, 2^{22220101112221} is an apocalyptic number.

It is an amenable number.

22220101112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22220101112221 is an equidigital number, since it uses as much as digits as its factorization.

22220101112221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22220101112221 its reverse (12221110102222), we get a palindrome (34441211214443).

The spelling of 22220101112221 in words is "twenty-two trillion, two hundred twenty billion, one hundred one million, one hundred twelve thousand, two hundred twenty-one".