22336021661 has 2 divisors, whose sum is σ = 22336021662. Its totient is φ = 22336021660.

The previous prime is 22336021607. The next prime is 22336021679. The reversal of 22336021661 is 16612063322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13159531225 + 9176490436 = 114715^2 + 95794^2 .

It is a cyclic number.

It is not a de Polignac number, because 22336021661 - 2²⁶ = 22268912797 is a prime.

It is a super-2 number, since 2×22336021661² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22336021261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11168010830 + 11168010831.

It is an arithmetic number, because the mean of its divisors is an integer number (11168010831).

Almost surely, 2^22336021661 is an apocalyptic number.

It is an amenable number.

22336021661 is a deficient number, since it is larger than the sum of its proper divisors (1).

22336021661 is an equidigital number, since it uses as much as digits as its factorization.

22336021661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 32.

Adding to 22336021661 its reverse (16612063322), we get a palindrome (38948084983).

The spelling of 22336021661 in words is "twenty-two billion, three hundred thirty-six million, twenty-one thousand, six hundred sixty-one".