20221220012 has 12 divisors (see below), whose sum is σ = 40442440080. Its totient is φ = 8666237136.

The previous prime is 20221219979. The next prime is 20221220023. The reversal of 20221220012 is 21002212202.

20221220012 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (14).

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 3 ways as a sum of consecutive naturals, for example, 361093187 + ... + 361093242.

It is an arithmetic number, because the mean of its divisors is an integer number (3370203340).

Almost surely, 2^20221220012 is an apocalyptic number.

It is an amenable number.

20221220012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20221220012 is a wasteful number, since it uses less digits than its factorization.

20221220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722186440 (or 722186438 counting only the distinct ones).

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

Adding to 20221220012 its reverse (21002212202), we get a palindrome (41223432214).

The spelling of 20221220012 in words is "twenty billion, two hundred twenty-one million, two hundred twenty thousand, twelve".