21422043371 has 2 divisors, whose sum is σ = 21422043372. Its totient is φ = 21422043370.

The previous prime is 21422043317. The next prime is 21422043443. The reversal of 21422043371 is 17334022412.

Together with previous prime (21422043317) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21422043371 - 2²⁶ = 21354934507 is a prime.

It is not a weakly prime, because it can be changed into another prime (21422043311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711021685 + 10711021686.

It is an arithmetic number, because the mean of its divisors is an integer number (10711021686).

Almost surely, 2^21422043371 is an apocalyptic number.

21422043371 is a deficient number, since it is larger than the sum of its proper divisors (1).

21422043371 is an equidigital number, since it uses as much as digits as its factorization.

21422043371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 29.

Adding to 21422043371 its reverse (17334022412), we get a palindrome (38756065783).

The spelling of 21422043371 in words is "twenty-one billion, four hundred twenty-two million, forty-three thousand, three hundred seventy-one".