20110012210021 has 4 divisors (see below), whose sum is σ = 20758722281344. Its totient is φ = 19461302138700.

The previous prime is 20110012210009. The next prime is 20110012210027. The reversal of 20110012210021 is 12001221001102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20110012210021 - 2¹⁹ = 20110011685733 is a prime.

It is a super-3 number, since 3×20110012210021³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 20110012209983 and 20110012210010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110012210027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324355035615 + ... + 324355035676.

It is an arithmetic number, because the mean of its divisors is an integer number (5189680570336).

Almost surely, 2^{20110012210021} is an apocalyptic number.

It is an amenable number.

20110012210021 is a deficient number, since it is larger than the sum of its proper divisors (648710071323).

20110012210021 is an equidigital number, since it uses as much as digits as its factorization.

20110012210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648710071322.

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

Adding to 20110012210021 its reverse (12001221001102), we get a palindrome (32111233211123).

The spelling of 20110012210021 in words is "twenty trillion, one hundred ten billion, twelve million, two hundred ten thousand, twenty-one".