22021220012 has 24 divisors (see below), whose sum is σ = 42934993920. Its totient is φ = 9796673360.

The previous prime is 22021219973. The next prime is 22021220029. The reversal of 22021220012 is 21002212022.

It is a super-4 number, since 4×22021220012⁴ (a number of 42 digits) contains 4444 as substring.

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 7 ways as a sum of consecutive naturals, for example, 5322212 + ... + 5326347.

It is an arithmetic number, because the mean of its divisors is an integer number (1788958080).

Almost surely, 2^22021220012 is an apocalyptic number.

22021220012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22021220012 is a deficient number, since it is larger than the sum of its proper divisors (20913773908).

22021220012 is a wasteful number, since it uses less digits than its factorization.

22021220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10648621 (or 10648619 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22021220012 its reverse (21002212022), we get a palindrome (43023432034).

The spelling of 22021220012 in words is "twenty-two billion, twenty-one million, two hundred twenty thousand, twelve".