123113111566 has 8 divisors (see below), whose sum is σ = 184752226440. Its totient is φ = 61529036088.

The previous prime is 123113111519. The next prime is 123113111573. The reversal of 123113111566 is 665111311321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13754256 + ... + 13763203.

It is an arithmetic number, because the mean of its divisors is an integer number (23094028305).

Almost surely, 2^123113111566 is an apocalyptic number.

123113111566 is a deficient number, since it is larger than the sum of its proper divisors (61639114874).

123113111566 is a wasteful number, since it uses less digits than its factorization.

123113111566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27519698.

The product of its digits is 3240, while the sum is 31.

Adding to 123113111566 its reverse (665111311321), we get a palindrome (788224422887).

The spelling of 123113111566 in words is "one hundred twenty-three billion, one hundred thirteen million, one hundred eleven thousand, five hundred sixty-six".