22013422421 has 2 divisors, whose sum is σ = 22013422422. Its totient is φ = 22013422420.

The previous prime is 22013422391. The next prime is 22013422423. The reversal of 22013422421 is 12422431022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14271886225 + 7741536196 = 119465^2 + 87986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22013422421 is a prime.

It is a Sophie Germain prime.

Together with 22013422423, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22013422423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11006711210 + 11006711211.

It is an arithmetic number, because the mean of its divisors is an integer number (11006711211).

Almost surely, 2^22013422421 is an apocalyptic number.

It is an amenable number.

22013422421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22013422421 is an equidigital number, since it uses as much as digits as its factorization.

22013422421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 22013422421 its reverse (12422431022), we get a palindrome (34435853443).

The spelling of 22013422421 in words is "twenty-two billion, thirteen million, four hundred twenty-two thousand, four hundred twenty-one".