131111201221123 has 16 divisors (see below), whose sum is σ = 133341374478816. Its totient is φ = 128900227230720.

The previous prime is 131111201221081. The next prime is 131111201221129. The reversal of 131111201221123 is 321122102111131.

It is a cyclic number.

It is not a de Polignac number, because 131111201221123 - 2⁴⁵ = 95926829132291 is a prime.

It is a super-2 number, since 2×131111201221123² (a number of 29 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 = 131111201221094 and 131111201221103.

It is not an unprimeable number, because it can be changed into a prime (131111201221129) 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, 16510540 + ... + 23126182.

It is an arithmetic number, because the mean of its divisors is an integer number (8333835904926).

Almost surely, 2^{131111201221123} is an apocalyptic number.

131111201221123 is a deficient number, since it is larger than the sum of its proper divisors (2230173257693).

131111201221123 is a wasteful number, since it uses less digits than its factorization.

131111201221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6617094.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 131111201221123 its reverse (321122102111131), we get a palindrome (452233303332254).

The spelling of 131111201221123 in words is "one hundred thirty-one trillion, one hundred eleven billion, two hundred one million, two hundred twenty-one thousand, one hundred twenty-three".