21122344143449 has 2 divisors, whose sum is σ = 21122344143450. Its totient is φ = 21122344143448.

The previous prime is 21122344143323. The next prime is 21122344143469. The reversal of 21122344143449 is 94434144322112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21057131328025 + 65212815424 = 4588805^2 + 255368^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21122344143449 is a prime.

It is a super-2 number, since 2×21122344143449² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21122344143469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561172071724 + 10561172071725.

It is an arithmetic number, because the mean of its divisors is an integer number (10561172071725).

Almost surely, 2^{21122344143449} is an apocalyptic number.

It is an amenable number.

21122344143449 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122344143449 is an equidigital number, since it uses as much as digits as its factorization.

21122344143449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 44.

The spelling of 21122344143449 in words is "twenty-one trillion, one hundred twenty-two billion, three hundred forty-four million, one hundred forty-three thousand, four hundred forty-nine".