22121133165 has 24 divisors (see below), whose sum is σ = 38346762168. Its totient is φ = 11796871680.

The previous prime is 22121133121. The next prime is 22121133239. The reversal of 22121133165 is 56133112122.

It can be written as a sum of positive squares in 4 ways, for example, as 6844914756 + 15276218409 = 82734^2 + 123597^2 .

It is not a de Polignac number, because 22121133165 - 2²⁰ = 22120084589 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 929697 + ... + 953193.

It is an arithmetic number, because the mean of its divisors is an integer number (1597781757).

Almost surely, 2^22121133165 is an apocalyptic number.

It is an amenable number.

22121133165 is a deficient number, since it is larger than the sum of its proper divisors (16225629003).

22121133165 is a wasteful number, since it uses less digits than its factorization.

22121133165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44429 (or 44426 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

Adding to 22121133165 its reverse (56133112122), we get a palindrome (78254245287).

The spelling of 22121133165 in words is "twenty-two billion, one hundred twenty-one million, one hundred thirty-three thousand, one hundred sixty-five".