222201112181 has 2 divisors, whose sum is σ = 222201112182. Its totient is φ = 222201112180.

The previous prime is 222201112121. The next prime is 222201112283. The reversal of 222201112181 is 181211102222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131594092081 + 90607020100 = 362759^2 + 301010^2 .

It is a cyclic number.

It is not a de Polignac number, because 222201112181 - 2¹⁰ = 222201111157 is a prime.

It is a super-2 number, since 2×222201112181² (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 (222201112121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111100556090 + 111100556091.

It is an arithmetic number, because the mean of its divisors is an integer number (111100556091).

Almost surely, 2^222201112181 is an apocalyptic number.

It is an amenable number.

222201112181 is a deficient number, since it is larger than the sum of its proper divisors (1).

222201112181 is an equidigital number, since it uses as much as digits as its factorization.

222201112181 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 23.

The spelling of 222201112181 in words is "two hundred twenty-two billion, two hundred one million, one hundred twelve thousand, one hundred eighty-one".