101112221022181 has 2 divisors, whose sum is σ = 101112221022182. Its totient is φ = 101112221022180.

The previous prime is 101112221022139. The next prime is 101112221022217. The reversal of 101112221022181 is 181220122211101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75511059884100 + 25601161138081 = 8689710^2 + 5059759^2 .

It is a cyclic number.

It is not a de Polignac number, because 101112221022181 - 2³⁷ = 100974782068709 is a prime.

It is a super-2 number, since 2×101112221022181² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101112221022781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50556110511090 + 50556110511091.

It is an arithmetic number, because the mean of its divisors is an integer number (50556110511091).

Almost surely, 2^{101112221022181} is an apocalyptic number.

It is an amenable number.

101112221022181 is a deficient number, since it is larger than the sum of its proper divisors (1).

101112221022181 is an equidigital number, since it uses as much as digits as its factorization.

101112221022181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 25.

Adding to 101112221022181 its reverse (181220122211101), we get a palindrome (282332343233282).

The spelling of 101112221022181 in words is "one hundred one trillion, one hundred twelve billion, two hundred twenty-one million, twenty-two thousand, one hundred eighty-one".