22121257330 has 16 divisors (see below), whose sum is σ = 39821721624. Its totient is φ = 8847734400.

The previous prime is 22121257261. The next prime is 22121257339. The reversal of 22121257330 is 3375212122.

It can be written as a sum of positive squares in 4 ways, for example, as 17718005881 + 4403251449 = 133109^2 + 66357^2 .

It is not an unprimeable number, because it can be changed into a prime (22121257339) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 33094 + ... + 212926.

Almost surely, 2^22121257330 is an apocalyptic number.

22121257330 is a deficient number, since it is larger than the sum of its proper divisors (17700464294).

22121257330 is a wasteful number, since it uses less digits than its factorization.

22121257330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192141.

The product of its (nonzero) digits is 5040, while the sum is 28.

Adding to 22121257330 its reverse (3375212122), we get a palindrome (25496469452).

The spelling of 22121257330 in words is "twenty-two billion, one hundred twenty-one million, two hundred fifty-seven thousand, three hundred thirty".