221112003181 has 2 divisors, whose sum is σ = 221112003182. Its totient is φ = 221112003180.

The previous prime is 221112003163. The next prime is 221112003193. The reversal of 221112003181 is 181300211122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116113970025 + 104998033156 = 340755^2 + 324034^2 .

It is a cyclic number.

It is not a de Polignac number, because 221112003181 - 2⁵ = 221112003149 is a prime.

It is a super-2 number, since 2×221112003181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221112003481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110556001590 + 110556001591.

It is an arithmetic number, because the mean of its divisors is an integer number (110556001591).

Almost surely, 2^221112003181 is an apocalyptic number.

It is an amenable number.

221112003181 is a deficient number, since it is larger than the sum of its proper divisors (1).

221112003181 is an equidigital number, since it uses as much as digits as its factorization.

221112003181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 22.

The spelling of 221112003181 in words is "two hundred twenty-one billion, one hundred twelve million, three thousand, one hundred eighty-one".