21322223201 has 2 divisors, whose sum is σ = 21322223202. Its totient is φ = 21322223200.

The previous prime is 21322223189. The next prime is 21322223207. The reversal of 21322223201 is 10232222312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18659560000 + 2662663201 = 136600^2 + 51601^2 .

It is a cyclic number.

It is not a de Polignac number, because 21322223201 - 2¹⁸ = 21321961057 is a prime.

It is not a weakly prime, because it can be changed into another prime (21322223207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661111600 + 10661111601.

It is an arithmetic number, because the mean of its divisors is an integer number (10661111601).

Almost surely, 2^21322223201 is an apocalyptic number.

It is an amenable number.

21322223201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21322223201 is an equidigital number, since it uses as much as digits as its factorization.

21322223201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21322223201 its reverse (10232222312), we get a palindrome (31554445513).

The spelling of 21322223201 in words is "twenty-one billion, three hundred twenty-two million, two hundred twenty-three thousand, two hundred one".