20113011131123 has 4 divisors (see below), whose sum is σ = 21171590664360. Its totient is φ = 19054431597888.

The previous prime is 20113011131117. The next prime is 20113011131153. The reversal of 20113011131123 is 32113111031102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20113011131123 is a prime.

It is a super-2 number, since 2×20113011131123² (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 = 20113011131095 and 20113011131104.

It is not an unprimeable number, because it can be changed into a prime (20113011131153) 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, 529289766590 + ... + 529289766627.

It is an arithmetic number, because the mean of its divisors is an integer number (5292897666090).

Almost surely, 2^{20113011131123} is an apocalyptic number.

20113011131123 is a deficient number, since it is larger than the sum of its proper divisors (1058579533237).

20113011131123 is a wasteful number, since it uses less digits than its factorization.

20113011131123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058579533236.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 20113011131123 its reverse (32113111031102), we get a palindrome (52226122162225).

The spelling of 20113011131123 in words is "twenty trillion, one hundred thirteen billion, eleven million, one hundred thirty-one thousand, one hundred twenty-three".