20112102021123 has 32 divisors (see below), whose sum is σ = 34204936908800. Its totient is φ = 11441093246208.

The previous prime is 20112102021119. The next prime is 20112102021169. The reversal of 20112102021123 is 32112020121102.

20112102021123 is a `hidden beast` number, since 201 + 1 + 210 + 20 + 211 + 23 = 666.

It is not a de Polignac number, because 20112102021123 - 2² = 20112102021119 is a prime.

It is a super-2 number, since 2×20112102021123² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20112102021096 and 20112102021105.

It is not an unprimeable number, because it can be changed into a prime (20112102021223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 238552558 + ... + 238636851.

It is an arithmetic number, because the mean of its divisors is an integer number (1068904278400).

Almost surely, 2^{20112102021123} is an apocalyptic number.

20112102021123 is a deficient number, since it is larger than the sum of its proper divisors (14092834887677).

20112102021123 is a wasteful number, since it uses less digits than its factorization.

20112102021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477189648 (or 477189642 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 20112102021123 its reverse (32112020121102), we get a palindrome (52224122142225).

The spelling of 20112102021123 in words is "twenty trillion, one hundred twelve billion, one hundred two million, twenty-one thousand, one hundred twenty-three".