22221007 has 2 divisors, whose sum is σ = 22221008. Its totient is φ = 22221006.

The previous prime is 22220987. The next prime is 22221029. The reversal of 22221007 is 70012222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22221007 - 2⁷ = 22220879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22221037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110503 + 11110504.

It is an arithmetic number, because the mean of its divisors is an integer number (11110504).

Almost surely, 2^22221007 is an apocalyptic number.

22221007 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221007 is an equidigital number, since it uses as much as digits as its factorization.

22221007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 22221007 is about 4713.9163123670. The cubic root of 22221007 is about 281.1390968832.

Adding to 22221007 its reverse (70012222), we get a palindrome (92233229).

The spelling of 22221007 in words is "twenty-two million, two hundred twenty-one thousand, seven".