20031132111123 has 64 divisors (see below), whose sum is σ = 31940775659520. Its totient is φ = 10924778188800.

The previous prime is 20031132111091. The next prime is 20031132111127. The reversal of 20031132111123 is 32111123113002.

It is not a de Polignac number, because 20031132111123 - 2⁵ = 20031132111091 is a prime.

It is a super-2 number, since 2×20031132111123² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20031132111123.

It is not an unprimeable number, because it can be changed into a prime (20031132111127) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17864163 + ... + 18952323.

It is an arithmetic number, because the mean of its divisors is an integer number (499074619680).

Almost surely, 2^{20031132111123} is an apocalyptic number.

20031132111123 is a deficient number, since it is larger than the sum of its proper divisors (11909643548397).

20031132111123 is a wasteful number, since it uses less digits than its factorization.

20031132111123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088548.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 20031132111123 its reverse (32111123113002), we get a palindrome (52142255224125).

The spelling of 20031132111123 in words is "twenty trillion, thirty-one billion, one hundred thirty-two million, one hundred eleven thousand, one hundred twenty-three".