22431404004221 has 2 divisors, whose sum is σ = 22431404004222. Its totient is φ = 22431404004220.

The previous prime is 22431404004167. The next prime is 22431404004371. The reversal of 22431404004221 is 12240040413422.

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., 17642637698596 + 4788766305625 = 4200314^2 + 2188325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22431404004221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22431404009221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11215702002110 + 11215702002111.

It is an arithmetic number, because the mean of its divisors is an integer number (11215702002111).

Almost surely, 2^{22431404004221} is an apocalyptic number.

It is an amenable number.

22431404004221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22431404004221 is an equidigital number, since it uses as much as digits as its factorization.

22431404004221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 22431404004221 its reverse (12240040413422), we get a palindrome (34671444417643).

The spelling of 22431404004221 in words is "twenty-two trillion, four hundred thirty-one billion, four hundred four million, four thousand, two hundred twenty-one".