20110002000021 has 12 divisors (see below), whose sum is σ = 29047820959872. Its totient is φ = 13406649403176.

The previous prime is 20110002000001. The next prime is 20110002000113. The reversal of 20110002000021 is 12000020001102.

It is not a de Polignac number, because 20110002000021 - 2⁹ = 20110001999509 is a prime.

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 = 20110001999967 and 20110002000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110002000001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9287740 + ... + 11246426.

It is an arithmetic number, because the mean of its divisors is an integer number (2420651746656).

Almost surely, 2^{20110002000021} is an apocalyptic number.

It is an amenable number.

20110002000021 is a deficient number, since it is larger than the sum of its proper divisors (8937818959851).

20110002000021 is a wasteful number, since it uses less digits than its factorization.

20110002000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099480 (or 3099477 counting only the distinct ones).

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

Adding to 20110002000021 its reverse (12000020001102), we get a palindrome (32110022001123).

The spelling of 20110002000021 in words is "twenty trillion, one hundred ten billion, two million, twenty-one", and thus it is an aban number.