22221320312 has 16 divisors (see below), whose sum is σ = 41667015600. Its totient is φ = 11110116160.

The previous prime is 22221320293. The next prime is 22221320351. The reversal of 22221320312 is 21302312222.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144764 + ... + 255732.

It is an arithmetic number, because the mean of its divisors is an integer number (2604188475).

Almost surely, 2^22221320312 is an apocalyptic number.

It is an amenable number.

22221320312 is a deficient number, since it is larger than the sum of its proper divisors (19445695288).

22221320312 is a wasteful number, since it uses less digits than its factorization.

22221320312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136006 (or 136002 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 22221320312 its reverse (21302312222), we get a palindrome (43523632534).

The spelling of 22221320312 in words is "twenty-two billion, two hundred twenty-one million, three hundred twenty thousand, three hundred twelve".