111131022113081 has 2 divisors, whose sum is σ = 111131022113082. Its totient is φ = 111131022113080.

The previous prime is 111131022113057. The next prime is 111131022113107. The reversal of 111131022113081 is 180311220131111.

It is an a-pointer prime, because the next prime (111131022113107) can be obtained adding 111131022113081 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78507733690681 + 32623288422400 = 8860459^2 + 5711680^2 .

It is an emirp because it is prime and its reverse (180311220131111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111131022113081 - 2¹⁴ = 111131022096697 is a prime.

It is a super-2 number, since 2×111131022113081² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111131022113081.

It is not a weakly prime, because it can be changed into another prime (111131022115081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55565511056540 + 55565511056541.

It is an arithmetic number, because the mean of its divisors is an integer number (55565511056541).

Almost surely, 2^{111131022113081} is an apocalyptic number.

It is an amenable number.

111131022113081 is a deficient number, since it is larger than the sum of its proper divisors (1).

111131022113081 is an equidigital number, since it uses as much as digits as its factorization.

111131022113081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 26.

Adding to 111131022113081 its reverse (180311220131111), we get a palindrome (291442242244192).

The spelling of 111131022113081 in words is "one hundred eleven trillion, one hundred thirty-one billion, twenty-two million, one hundred thirteen thousand, eighty-one".