22112120021 has 2 divisors, whose sum is σ = 22112120022. Its totient is φ = 22112120020.

The previous prime is 22112119961. The next prime is 22112120027. The reversal of 22112120021 is 12002121122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11644783921 + 10467336100 = 107911^2 + 102310^2 .

It is a cyclic number.

It is not a de Polignac number, because 22112120021 - 2⁶ = 22112119957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22112119978 and 22112120005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22112120027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11056060010 + 11056060011.

It is an arithmetic number, because the mean of its divisors is an integer number (11056060011).

Almost surely, 2^22112120021 is an apocalyptic number.

It is an amenable number.

22112120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22112120021 is an equidigital number, since it uses as much as digits as its factorization.

22112120021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22112120021 its reverse (12002121122), we get a palindrome (34114241143).

It can be divided in two parts, 221121 and 20021, that added together give a palindrome (241142).

The spelling of 22112120021 in words is "twenty-two billion, one hundred twelve million, one hundred twenty thousand, twenty-one".