22221210012 has 48 divisors (see below), whose sum is σ = 53139469824. Its totient is φ = 7222960000.

The previous prime is 22221210007. The next prime is 22221210023. The reversal of 22221210012 is 21001212222.

It is a junction number, because it is equal to n+sod(n) for n = 22221209973 and 22221210000.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1147087 + ... + 1166297.

It is an arithmetic number, because the mean of its divisors is an integer number (1107072288).

Almost surely, 2^22221210012 is an apocalyptic number.

It is an amenable number.

22221210012 is an abundant number, since it is smaller than the sum of its proper divisors (30918259812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22221210012 is a wasteful number, since it uses less digits than its factorization.

22221210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21610 (or 21608 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22221210012 its reverse (21001212222), we get a palindrome (43222422234).

The spelling of 22221210012 in words is "twenty-two billion, two hundred twenty-one million, two hundred ten thousand, twelve".