20001222012 has 24 divisors (see below), whose sum is σ = 46740355200. Its totient is φ = 6656954416.

The previous prime is 20001221987. The next prime is 20001222013. The reversal of 20001222012 is 21022210002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001222013) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1256712 + ... + 1272527.

It is an arithmetic number, because the mean of its divisors is an integer number (1947514800).

Almost surely, 2^20001222012 is an apocalyptic number.

It is an amenable number.

20001222012 is an abundant number, since it is smaller than the sum of its proper divisors (26739133188).

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

20001222012 is a wasteful number, since it uses less digits than its factorization.

20001222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529905 (or 2529903 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20001222012 its reverse (21022210002), we get a palindrome (41023432014).

The spelling of 20001222012 in words is "twenty billion, one million, two hundred twenty-two thousand, twelve".