20112112000021 has 16 divisors (see below), whose sum is σ = 20924767987200. Its totient is φ = 19307507401728.

The previous prime is 20112112000009. The next prime is 20112112000031. The reversal of 20112112000021 is 12000021121102.

It is a cyclic number.

It is not a de Polignac number, because 20112112000021 - 2¹¹ = 20112111997973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112111999965 and 20112112000010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112112000031) 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, 9364900 + ... + 11310418.

It is an arithmetic number, because the mean of its divisors is an integer number (1307797999200).

Almost surely, 2^{20112112000021} is an apocalyptic number.

It is an amenable number.

20112112000021 is a deficient number, since it is larger than the sum of its proper divisors (812655987179).

20112112000021 is a wasteful number, since it uses less digits than its factorization.

20112112000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947588.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20112112000021 its reverse (12000021121102), we get a palindrome (32112133121123).

The spelling of 20112112000021 in words is "twenty trillion, one hundred twelve billion, one hundred twelve million, twenty-one", and thus it is an aban number.