22021202345 has 12 divisors (see below), whose sum is σ = 27368091660. Its totient is φ = 17009477184.

The previous prime is 22021202339. The next prime is 22021202381. The reversal of 22021202345 is 54320212022.

It can be written as a sum of positive squares in 6 ways, for example, as 1719512089 + 20301690256 = 41467^2 + 142484^2 .

It is not a de Polignac number, because 22021202345 - 2²⁴ = 22004425129 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22021202345.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2614250 + ... + 2622659.

It is an arithmetic number, because the mean of its divisors is an integer number (2280674305).

Almost surely, 2^22021202345 is an apocalyptic number.

It is an amenable number.

22021202345 is a deficient number, since it is larger than the sum of its proper divisors (5346889315).

22021202345 is an equidigital number, since it uses as much as digits as its factorization.

22021202345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5236972 (or 5236943 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 22021202345 its reverse (54320212022), we get a palindrome (76341414367).

The spelling of 22021202345 in words is "twenty-two billion, twenty-one million, two hundred two thousand, three hundred forty-five".