222122201101421 has 2 divisors, whose sum is σ = 222122201101422. Its totient is φ = 222122201101420.

The previous prime is 222122201101417. The next prime is 222122201101441. The reversal of 222122201101421 is 124101102221222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198045416725321 + 24076784376100 = 14072861^2 + 4906810^2 .

It is a cyclic number.

It is not a de Polignac number, because 222122201101421 - 2² = 222122201101417 is a prime.

It is a super-2 number, since 2×222122201101421² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222122201101441) 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, 111061100550710 + 111061100550711.

It is an arithmetic number, because the mean of its divisors is an integer number (111061100550711).

Almost surely, 2^{222122201101421} is an apocalyptic number.

It is an amenable number.

222122201101421 is a deficient number, since it is larger than the sum of its proper divisors (1).

222122201101421 is an equidigital number, since it uses as much as digits as its factorization.

222122201101421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 222122201101421 its reverse (124101102221222), we get a palindrome (346223303322643).

The spelling of 222122201101421 in words is "two hundred twenty-two trillion, one hundred twenty-two billion, two hundred one million, one hundred one thousand, four hundred twenty-one".