112218221 has 2 divisors, whose sum is σ = 112218222. Its totient is φ = 112218220.

The previous prime is 112218167. The next prime is 112218229. The reversal of 112218221 is 122812211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74149321 + 38068900 = 8611^2 + 6170^2 .

It is an emirp because it is prime and its reverse (122812211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 112218221 - 2²² = 108023917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 112218193 and 112218202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (112218229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56109110 + 56109111.

It is an arithmetic number, because the mean of its divisors is an integer number (56109111).

Almost surely, 2^112218221 is an apocalyptic number.

It is an amenable number.

112218221 is a deficient number, since it is larger than the sum of its proper divisors (1).

112218221 is an equidigital number, since it uses as much as digits as its factorization.

112218221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128, while the sum is 20.

The square root of 112218221 is about 10593.3102003104. The cubic root of 112218221 is about 482.3413114309.

The spelling of 112218221 in words is "one hundred twelve million, two hundred eighteen thousand, two hundred twenty-one".