22120122121 has 2 divisors, whose sum is σ = 22120122122. Its totient is φ = 22120122120.

The previous prime is 22120122113. The next prime is 22120122131. The reversal of 22120122121 is 12122102122.

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., 22010689600 + 109432521 = 148360^2 + 10461^2 .

It is a cyclic number.

It is not a de Polignac number, because 22120122121 - 2³ = 22120122113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22120122095 and 22120122104.

It is not a weakly prime, because it can be changed into another prime (22120122131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060061060 + 11060061061.

It is an arithmetic number, because the mean of its divisors is an integer number (11060061061).

Almost surely, 2^22120122121 is an apocalyptic number.

It is an amenable number.

22120122121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22120122121 is an equidigital number, since it uses as much as digits as its factorization.

22120122121 is an evil number, because the sum of its binary digits is even.

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

Adding to 22120122121 its reverse (12122102122), we get a palindrome (34242224243).

The spelling of 22120122121 in words is "twenty-two billion, one hundred twenty million, one hundred twenty-two thousand, one hundred twenty-one".