22135344421 has 2 divisors, whose sum is σ = 22135344422. Its totient is φ = 22135344420.

The previous prime is 22135344397. The next prime is 22135344467. The reversal of 22135344421 is 12444353122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21129820321 + 1005524100 = 145361^2 + 31710^2 .

It is a cyclic number.

It is not a de Polignac number, because 22135344421 - 2⁵ = 22135344389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22135344521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11067672210 + 11067672211.

It is an arithmetic number, because the mean of its divisors is an integer number (11067672211).

Almost surely, 2^22135344421 is an apocalyptic number.

It is an amenable number.

22135344421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22135344421 is an equidigital number, since it uses as much as digits as its factorization.

22135344421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 31.

Adding to 22135344421 its reverse (12444353122), we get a palindrome (34579697543).

The spelling of 22135344421 in words is "twenty-two billion, one hundred thirty-five million, three hundred forty-four thousand, four hundred twenty-one".