22212101 has 2 divisors, whose sum is σ = 22212102. Its totient is φ = 22212100.

The previous prime is 22212097. The next prime is 22212107. The reversal of 22212101 is 10121222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22137025 + 75076 = 4705^2 + 274^2 .

It is a cyclic number.

It is not a de Polignac number, because 22212101 - 2² = 22212097 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22212107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106050 + 11106051.

It is an arithmetic number, because the mean of its divisors is an integer number (11106051).

Almost surely, 2^22212101 is an apocalyptic number.

It is an amenable number.

22212101 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212101 is an equidigital number, since it uses as much as digits as its factorization.

22212101 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 22212101 is about 4712.9715679176. The cubic root of 22212101 is about 281.1015324384.

Adding to 22212101 its reverse (10121222), we get a palindrome (32333323).

The spelling of 22212101 in words is "twenty-two million, two hundred twelve thousand, one hundred one".