22011320173 has 2 divisors, whose sum is σ = 22011320174. Its totient is φ = 22011320172.

The previous prime is 22011320159. The next prime is 22011320209. The reversal of 22011320173 is 37102311022.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14588291524 + 7423028649 = 120782^2 + 86157^2 .

It is a cyclic number.

It is not a de Polignac number, because 22011320173 - 2⁹ = 22011319661 is a prime.

It is a super-3 number, since 3×22011320173³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22011350173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11005660086 + 11005660087.

It is an arithmetic number, because the mean of its divisors is an integer number (11005660087).

Almost surely, 2^22011320173 is an apocalyptic number.

It is an amenable number.

22011320173 is a deficient number, since it is larger than the sum of its proper divisors (1).

22011320173 is an equidigital number, since it uses as much as digits as its factorization.

22011320173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

Adding to 22011320173 its reverse (37102311022), we get a palindrome (59113631195).

The spelling of 22011320173 in words is "twenty-two billion, eleven million, three hundred twenty thousand, one hundred seventy-three".