20010021000012 has 36 divisors (see below), whose sum is σ = 52780055393520. Its totient is φ = 6380006695392.

The previous prime is 20010021000001. The next prime is 20010021000041. The reversal of 20010021000012 is 21000012001002.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20010020999958 and 20010021000003.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12083345187 + ... + 12083346842.

It is an arithmetic number, because the mean of its divisors is an integer number (1466112649820).

Almost surely, 2^{20010021000012} is an apocalyptic number.

It is an amenable number.

20010021000012 is an abundant number, since it is smaller than the sum of its proper divisors (32770034393508).

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

20010021000012 is a wasteful number, since it uses less digits than its factorization.

20010021000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24166692062 (or 24166692057 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20010021000012 its reverse (21000012001002), we get a palindrome (41010033001014).

The spelling of 20010021000012 in words is "twenty trillion, ten billion, twenty-one million, twelve", and thus it is an aban number and an uban number.