21122933773 has 2 divisors, whose sum is σ = 21122933774. Its totient is φ = 21122933772.

The previous prime is 21122933743. The next prime is 21122933779. The reversal of 21122933773 is 37733922112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18456037609 + 2666896164 = 135853^2 + 51642^2 .

It is a cyclic number.

It is not a de Polignac number, because 21122933773 - 2²⁵ = 21089379341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21122933779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561466886 + 10561466887.

It is an arithmetic number, because the mean of its divisors is an integer number (10561466887).

Almost surely, 2^21122933773 is an apocalyptic number.

It is an amenable number.

21122933773 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122933773 is an equidigital number, since it uses as much as digits as its factorization.

21122933773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 40.

The spelling of 21122933773 in words is "twenty-one billion, one hundred twenty-two million, nine hundred thirty-three thousand, seven hundred seventy-three".