20021011012 has 12 divisors (see below), whose sum is σ = 35312650240. Its totient is φ = 9931682376.

The previous prime is 20021011007. The next prime is 20021011019. The reversal of 20021011012 is 21011012002.

It is a self number, because there is not a number n which added to its sum of digits gives 20021011012.

It is not an unprimeable number, because it can be changed into a prime (20021011019) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 19705212 + ... + 19706227.

Almost surely, 2^20021011012 is an apocalyptic number.

It is an amenable number.

20021011012 is a deficient number, since it is larger than the sum of its proper divisors (15291639228).

20021011012 is a wasteful number, since it uses less digits than its factorization.

20021011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39411570 (or 39411568 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20021011012 its reverse (21011012002), we get a palindrome (41032023014).

The spelling of 20021011012 in words is "twenty billion, twenty-one million, eleven thousand, twelve".