21322223012947 has 2 divisors, whose sum is σ = 21322223012948. Its totient is φ = 21322223012946.

The previous prime is 21322223012933. The next prime is 21322223013019. The reversal of 21322223012947 is 74921032222312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21322223012947 - 2¹⁹ = 21322222488659 is a prime.

It is not a weakly prime, because it can be changed into another prime (21322223012917) 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, 10661111506473 + 10661111506474.

It is an arithmetic number, because the mean of its divisors is an integer number (10661111506474).

Almost surely, 2^{21322223012947} is an apocalyptic number.

21322223012947 is a deficient number, since it is larger than the sum of its proper divisors (1).

21322223012947 is an equidigital number, since it uses as much as digits as its factorization.

21322223012947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 21322223012947 in words is "twenty-one trillion, three hundred twenty-two billion, two hundred twenty-three million, twelve thousand, nine hundred forty-seven".