222112001 has 2 divisors, whose sum is σ = 222112002. Its totient is φ = 222112000.

The previous prime is 222111983. The next prime is 222112003. The reversal of 222112001 is 100211222.

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., 217267600 + 4844401 = 14740^2 + 2201^2 .

It is a cyclic number.

It is not a de Polignac number, because 222112001 - 2⁶ = 222111937 is a prime.

Together with 222112003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (222112003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111056000 + 111056001.

It is an arithmetic number, because the mean of its divisors is an integer number (111056001).

Almost surely, 2^222112001 is an apocalyptic number.

It is an amenable number.

222112001 is a deficient number, since it is larger than the sum of its proper divisors (1).

222112001 is an equidigital number, since it uses as much as digits as its factorization.

222112001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 222112001 is about 14903.4224592877. The cubic root of 222112001 is about 605.6067050897.

Adding to 222112001 its reverse (100211222), we get a palindrome (322323223).

The spelling of 222112001 in words is "two hundred twenty-two million, one hundred twelve thousand, one".