22422211222421 has 2 divisors, whose sum is σ = 22422211222422. Its totient is φ = 22422211222420.

The previous prime is 22422211222409. The next prime is 22422211222441. The reversal of 22422211222421 is 12422211222422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13702953062500 + 8719258159921 = 3701750^2 + 2952839^2 .

It is a cyclic number.

It is not a de Polignac number, because 22422211222421 - 2³⁸ = 22147333315477 is a prime.

It is a super-2 number, since 2×22422211222421² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22422211222441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11211105611210 + 11211105611211.

It is an arithmetic number, because the mean of its divisors is an integer number (11211105611211).

Almost surely, 2^{22422211222421} is an apocalyptic number.

It is an amenable number.

22422211222421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22422211222421 is an equidigital number, since it uses as much as digits as its factorization.

22422211222421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8192, while the sum is 29.

Adding to 22422211222421 its reverse (12422211222422), we get a palindrome (34844422444843).

Subtracting from 22422211222421 its reverse (12422211222422), we obtain a palindrome (9999999999999).

The spelling of 22422211222421 in words is "twenty-two trillion, four hundred twenty-two billion, two hundred eleven million, two hundred twenty-two thousand, four hundred twenty-one".