22201122121 has 2 divisors, whose sum is σ = 22201122122. Its totient is φ = 22201122120.

The previous prime is 22201122107. The next prime is 22201122143. The reversal of 22201122121 is 12122110222.

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., 20033288521 + 2167833600 = 141539^2 + 46560^2 .

It is a cyclic number.

It is not a de Polignac number, because 22201122121 - 2⁷ = 22201121993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22201122095 and 22201122104.

It is not a weakly prime, because it can be changed into another prime (22201122221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11100561060 + 11100561061.

It is an arithmetic number, because the mean of its divisors is an integer number (11100561061).

Almost surely, 2^22201122121 is an apocalyptic number.

It is an amenable number.

22201122121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22201122121 is an equidigital number, since it uses as much as digits as its factorization.

22201122121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22201122121 its reverse (12122110222), we get a palindrome (34323232343).

The spelling of 22201122121 in words is "twenty-two billion, two hundred one million, one hundred twenty-two thousand, one hundred twenty-one".