20021000011012 has 48 divisors (see below), whose sum is σ = 47042349685632. Its totient is φ = 7200359642880.

The previous prime is 20021000010929. The next prime is 20021000011013. The reversal of 20021000011012 is 21011000012002.

It is a self number, because there is not a number n which added to its sum of digits gives 20021000011012.

It is not an unprimeable number, because it can be changed into a prime (20021000011013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2500120873 + ... + 2500128880.

It is an arithmetic number, because the mean of its divisors is an integer number (980048951784).

Almost surely, 2^{20021000011012} is an apocalyptic number.

20021000011012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20021000011012 is an abundant number, since it is smaller than the sum of its proper divisors (27021349674620).

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

20021000011012 is a wasteful number, since it uses less digits than its factorization.

20021000011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000249788 (or 5000249786 counting only the distinct ones).

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

Adding to 20021000011012 its reverse (21011000012002), we get a palindrome (41032000023014).

The spelling of 20021000011012 in words is "twenty trillion, twenty-one billion, eleven thousand, twelve".