22221241421 has 2 divisors, whose sum is σ = 22221241422. Its totient is φ = 22221241420.

The previous prime is 22221241351. The next prime is 22221241429. The reversal of 22221241421 is 12414212222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20310240196 + 1911001225 = 142514^2 + 43715^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221241421 - 2²⁶ = 22154132557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22221241429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110620710 + 11110620711.

It is an arithmetic number, because the mean of its divisors is an integer number (11110620711).

Almost surely, 2^22221241421 is an apocalyptic number.

It is an amenable number.

22221241421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221241421 is an equidigital number, since it uses as much as digits as its factorization.

22221241421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1024, while the sum is 23.

Adding to 22221241421 its reverse (12414212222), we get a palindrome (34635453643).

The spelling of 22221241421 in words is "twenty-two billion, two hundred twenty-one million, two hundred forty-one thousand, four hundred twenty-one".