111405125705 has 4 divisors (see below), whose sum is σ = 133686150852. Its totient is φ = 89124100560.

The previous prime is 111405125669. The next prime is 111405125707. The reversal of 111405125705 is 507521504111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 60345396409 + 51059729296 = 245653^2 + 225964^2 .

It is not a de Polignac number, because 111405125705 - 2⁶ = 111405125641 is a prime.

It is a super-2 number, since 2×111405125705² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111405125707) 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, 11140512566 + ... + 11140512575.

It is an arithmetic number, because the mean of its divisors is an integer number (33421537713).

Almost surely, 2^111405125705 is an apocalyptic number.

It is an amenable number.

111405125705 is a deficient number, since it is larger than the sum of its proper divisors (22281025147).

111405125705 is an equidigital number, since it uses as much as digits as its factorization.

111405125705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22281025146.

The product of its (nonzero) digits is 7000, while the sum is 32.

Adding to 111405125705 its reverse (507521504111), we get a palindrome (618926629816).

The spelling of 111405125705 in words is "one hundred eleven billion, four hundred five million, one hundred twenty-five thousand, seven hundred five".