22121020243 has 16 divisors (see below), whose sum is σ = 25334987776. Its totient is φ = 18920563200.

The previous prime is 22121020231. The next prime is 22121020289. The reversal of 22121020243 is 34202012122.

It is not a de Polignac number, because 22121020243 - 2⁹ = 22121019731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22121020243.

It is not an unprimeable number, because it can be changed into a prime (22121020223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10467955 + ... + 10470067.

It is an arithmetic number, because the mean of its divisors is an integer number (1583436736).

Almost surely, 2^22121020243 is an apocalyptic number.

22121020243 is a deficient number, since it is larger than the sum of its proper divisors (3213967533).

22121020243 is a wasteful number, since it uses less digits than its factorization.

22121020243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4594.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 22121020243 its reverse (34202012122), we get a palindrome (56323032365).

The spelling of 22121020243 in words is "twenty-two billion, one hundred twenty-one million, twenty thousand, two hundred forty-three".