222123001 has 2 divisors, whose sum is σ = 222123002. Its totient is φ = 222123000.

The previous prime is 222122981. The next prime is 222123043. The reversal of 222123001 is 100321222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162817600 + 59305401 = 12760^2 + 7701^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222123001 is a prime.

It is not a weakly prime, because it can be changed into another prime (222123701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111061500 + 111061501.

It is an arithmetic number, because the mean of its divisors is an integer number (111061501).

Almost surely, 2^222123001 is an apocalyptic number.

It is an amenable number.

222123001 is a deficient number, since it is larger than the sum of its proper divisors (1).

222123001 is an equidigital number, since it uses as much as digits as its factorization.

222123001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 222123001 is about 14903.7914974680. The cubic root of 222123001 is about 605.6167023940.

Adding to 222123001 its reverse (100321222), we get a palindrome (322444223).

The spelling of 222123001 in words is "two hundred twenty-two million, one hundred twenty-three thousand, one".