20112122110021 has 4 divisors (see below), whose sum is σ = 20125022767200. Its totient is φ = 20099221452844.

The previous prime is 20112122110013. The next prime is 20112122110037. The reversal of 20112122110021 is 12001122121102.

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 20112122110021 - 2³ = 20112122110013 is a prime.

It is a super-2 number, since 2×20112122110021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112122109977 and 20112122110004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112122110051) 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, 6450326251 + ... + 6450329368.

It is an arithmetic number, because the mean of its divisors is an integer number (5031255691800).

Almost surely, 2^{20112122110021} is an apocalyptic number.

It is an amenable number.

20112122110021 is a deficient number, since it is larger than the sum of its proper divisors (12900657179).

20112122110021 is a wasteful number, since it uses less digits than its factorization.

20112122110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12900657178.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20112122110021 its reverse (12001122121102), we get a palindrome (32113244231123).

The spelling of 20112122110021 in words is "twenty trillion, one hundred twelve billion, one hundred twenty-two million, one hundred ten thousand, twenty-one".