22120022225 has 36 divisors (see below), whose sum is σ = 32121409500. Its totient is φ = 15066092160.

The previous prime is 22120022201. The next prime is 22120022233. The reversal of 22120022225 is 52222002122.

It can be written as a sum of positive squares in 6 ways, for example, as 527483089 + 21592539136 = 22967^2 + 146944^2 .

It is not a de Polignac number, because 22120022225 - 2⁸ = 22120021969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22120022197 and 22120022206.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 121931 + ... + 243119.

It is an arithmetic number, because the mean of its divisors is an integer number (892261375).

Almost surely, 2^22120022225 is an apocalyptic number.

22120022225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22120022225 is a deficient number, since it is larger than the sum of its proper divisors (10001387275).

22120022225 is a wasteful number, since it uses less digits than its factorization.

22120022225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121362 (or 121350 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 22120022225 its reverse (52222002122), we get a palindrome (74342024347).

The spelling of 22120022225 in words is "twenty-two billion, one hundred twenty million, twenty-two thousand, two hundred twenty-five".