22221097 has 2 divisors, whose sum is σ = 22221098. Its totient is φ = 22221096.

The previous prime is 22221061. The next prime is 22221109. The reversal of 22221097 is 79012222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20693401 + 1527696 = 4549^2 + 1236^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221097 - 2¹⁵ = 22188329 is a prime.

It is not a weakly prime, because it can be changed into another prime (22221007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110548 + 11110549.

It is an arithmetic number, because the mean of its divisors is an integer number (11110549).

Almost surely, 2^22221097 is an apocalyptic number.

It is an amenable number.

22221097 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221097 is an equidigital number, since it uses as much as digits as its factorization.

22221097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 22221097 is about 4713.9258585599. The cubic root of 22221097 is about 281.1394764413.

The spelling of 22221097 in words is "twenty-two million, two hundred twenty-one thousand, ninety-seven".