111322220081 has 2 divisors, whose sum is σ = 111322220082. Its totient is φ = 111322220080.

The previous prime is 111322220069. The next prime is 111322220083. The reversal of 111322220081 is 180022223111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92330899600 + 18991320481 = 303860^2 + 137809^2 .

It is a cyclic number.

It is not a de Polignac number, because 111322220081 - 2⁶ = 111322220017 is a prime.

It is a super-2 number, since 2×111322220081² (a number of 23 digits) contains 22 as substring.

Together with 111322220083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111322220083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55661110040 + 55661110041.

It is an arithmetic number, because the mean of its divisors is an integer number (55661110041).

Almost surely, 2^111322220081 is an apocalyptic number.

It is an amenable number.

111322220081 is a deficient number, since it is larger than the sum of its proper divisors (1).

111322220081 is an equidigital number, since it uses as much as digits as its factorization.

111322220081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 111322220081 its reverse (180022223111), we get a palindrome (291344443192).

The spelling of 111322220081 in words is "one hundred eleven billion, three hundred twenty-two million, two hundred twenty thousand, eighty-one".