111111123204131 has 16 divisors (see below), whose sum is σ = 117597497303040. Its totient is φ = 104688835534080.

The previous prime is 111111123204121. The next prime is 111111123204139. The reversal of 111111123204131 is 131402321111111.

It is not a de Polignac number, because 111111123204131 - 2²² = 111111119009827 is a prime.

It is a super-2 number, since 2×111111123204131² (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 = 111111123204097 and 111111123204106.

It is not an unprimeable number, because it can be changed into a prime (111111123204139) 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, 12985526 + ... + 19769828.

It is an arithmetic number, because the mean of its divisors is an integer number (7349843581440).

Almost surely, 2^{111111123204131} is an apocalyptic number.

111111123204131 is a deficient number, since it is larger than the sum of its proper divisors (6486374098909).

111111123204131 is a wasteful number, since it uses less digits than its factorization.

111111123204131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6789026.

The product of its (nonzero) digits is 144, while the sum is 23.

Adding to 111111123204131 its reverse (131402321111111), we get a palindrome (242513444315242).

The spelling of 111111123204131 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred twenty-three million, two hundred four thousand, one hundred thirty-one".