22043783678921 has 2 divisors, whose sum is σ = 22043783678922. Its totient is φ = 22043783678920.

The previous prime is 22043783678837. The next prime is 22043783678989. The reversal of 22043783678921 is 12987638734022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15738763118521 + 6305020560400 = 3967211^2 + 2510980^2 .

It is a cyclic number.

It is not a de Polignac number, because 22043783678921 - 2¹⁸ = 22043783416777 is a prime.

It is not a weakly prime, because it can be changed into another prime (22043789678921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11021891839460 + 11021891839461.

It is an arithmetic number, because the mean of its divisors is an integer number (11021891839461).

Almost surely, 2^{22043783678921} is an apocalyptic number.

It is an amenable number.

22043783678921 is a deficient number, since it is larger than the sum of its proper divisors (1).

22043783678921 is an equidigital number, since it uses as much as digits as its factorization.

22043783678921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48771072, while the sum is 62.

The spelling of 22043783678921 in words is "twenty-two trillion, forty-three billion, seven hundred eighty-three million, six hundred seventy-eight thousand, nine hundred twenty-one".