111101112220081 has 2 divisors, whose sum is σ = 111101112220082. Its totient is φ = 111101112220080.

The previous prime is 111101112220027. The next prime is 111101112220129. The reversal of 111101112220081 is 180022211101111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95844276220081 + 15256836000000 = 9790009^2 + 3906000^2 .

It is a cyclic number.

It is not a de Polignac number, because 111101112220081 - 2¹³ = 111101112211889 is a prime.

It is a super-2 number, since 2×111101112220081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111101112223081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55550556110040 + 55550556110041.

It is an arithmetic number, because the mean of its divisors is an integer number (55550556110041).

Almost surely, 2^{111101112220081} is an apocalyptic number.

It is an amenable number.

111101112220081 is a deficient number, since it is larger than the sum of its proper divisors (1).

111101112220081 is an equidigital number, since it uses as much as digits as its factorization.

111101112220081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 22.

Adding to 111101112220081 its reverse (180022211101111), we get a palindrome (291123323321192).

The spelling of 111101112220081 in words is "one hundred eleven trillion, one hundred one billion, one hundred twelve million, two hundred twenty thousand, eighty-one".