22121204052 has 24 divisors (see below), whose sum is σ = 52714359936. Its totient is φ = 7216846528.

The previous prime is 22121204051. The next prime is 22121204059. The reversal of 22121204052 is 25040212122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121204051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19610433 + ... + 19611560.

It is an arithmetic number, because the mean of its divisors is an integer number (2196431664).

Almost surely, 2^22121204052 is an apocalyptic number.

It is an amenable number.

22121204052 is an abundant number, since it is smaller than the sum of its proper divisors (30593155884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22121204052 is a wasteful number, since it uses less digits than its factorization.

22121204052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39222047 (or 39222045 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 22121204052 its reverse (25040212122), we get a palindrome (47161416174).

The spelling of 22121204052 in words is "twenty-two billion, one hundred twenty-one million, two hundred four thousand, fifty-two".