22120022212121 has 12 divisors (see below), whose sum is σ = 22673326555932. Its totient is φ = 21579907200000.

The previous prime is 22120022212097. The next prime is 22120022212147. The reversal of 22120022212121 is 12121222002122.

It can be written as a sum of positive squares in 6 ways, for example, as 9393244225600 + 12726777986521 = 3064840^2 + 3567461^2 .

It is not a de Polignac number, because 22120022212121 - 2²² = 22120018017817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22120022212093 and 22120022212102.

It is not an unprimeable number, because it can be changed into a prime (22120022212181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67481621 + ... + 67808621.

It is an arithmetic number, because the mean of its divisors is an integer number (1889443879661).

Almost surely, 2^{22120022212121} is an apocalyptic number.

It is an amenable number.

22120022212121 is a deficient number, since it is larger than the sum of its proper divisors (553304343811).

22120022212121 is an equidigital number, since it uses as much as digits as its factorization.

22120022212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367324 (or 367283 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22120022212121 its reverse (12121222002122), we get a palindrome (34241244214243).

The spelling of 22120022212121 in words is "twenty-two trillion, one hundred twenty billion, twenty-two million, two hundred twelve thousand, one hundred twenty-one".