21222233117 has 2 divisors, whose sum is σ = 21222233118. Its totient is φ = 21222233116.

The previous prime is 21222233113. The next prime is 21222233189. The reversal of 21222233117 is 71133222212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21219457561 + 2775556 = 145669^2 + 1666^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222233117 - 2² = 21222233113 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222233113) 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, 10611116558 + 10611116559.

It is an arithmetic number, because the mean of its divisors is an integer number (10611116559).

Almost surely, 2^21222233117 is an apocalyptic number.

It is an amenable number.

21222233117 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222233117 is an equidigital number, since it uses as much as digits as its factorization.

21222233117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 26.

Adding to 21222233117 its reverse (71133222212), we get a palindrome (92355455329).

The spelling of 21222233117 in words is "twenty-one billion, two hundred twenty-two million, two hundred thirty-three thousand, one hundred seventeen".