20112112033121 has 16 divisors (see below), whose sum is σ = 22059679637520. Its totient is φ = 18259864043520.

The previous prime is 20112112033063. The next prime is 20112112033193. The reversal of 20112112033121 is 12133021121102.

It can be written as a sum of positive squares in 8 ways, for example, as 5306393280721 + 14805718752400 = 2303561^2 + 3847820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20112112033121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112112033093 and 20112112033102.

It is not an unprimeable number, because it can be changed into a prime (20112112033021) 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, 162046136 + ... + 162170201.

It is an arithmetic number, because the mean of its divisors is an integer number (1378729977345).

Almost surely, 2^{20112112033121} is an apocalyptic number.

It is an amenable number.

20112112033121 is a deficient number, since it is larger than the sum of its proper divisors (1947567604399).

20112112033121 is a wasteful number, since it uses less digits than its factorization.

20112112033121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324216484.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 20112112033121 its reverse (12133021121102), we get a palindrome (32245133154223).

The spelling of 20112112033121 in words is "twenty trillion, one hundred twelve billion, one hundred twelve million, thirty-three thousand, one hundred twenty-one".