22191101 has 2 divisors, whose sum is σ = 22191102. Its totient is φ = 22191100.

The previous prime is 22191079. The next prime is 22191163. The reversal of 22191101 is 10119122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20259001 + 1932100 = 4501^2 + 1390^2 .

It is a cyclic number.

It is not a de Polignac number, because 22191101 - 2¹⁸ = 21928957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22191101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22191401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11095550 + 11095551.

It is an arithmetic number, because the mean of its divisors is an integer number (11095551).

Almost surely, 2^22191101 is an apocalyptic number.

It is an amenable number.

22191101 is a deficient number, since it is larger than the sum of its proper divisors (1).

22191101 is an equidigital number, since it uses as much as digits as its factorization.

22191101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 22191101 is about 4710.7431473176. The cubic root of 22191101 is about 281.0129171757.

The spelling of 22191101 in words is "twenty-two million, one hundred ninety-one thousand, one hundred one".