123143210056 has 8 divisors (see below), whose sum is σ = 230893518870. Its totient is φ = 61571605024.

The previous prime is 123143210051. The next prime is 123143210059. The reversal of 123143210056 is 650012341321.

It can be written as a sum of positive squares in only one way, i.e., 69997284900 + 53145925156 = 264570^2 + 230534^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×123143210056³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (123143210051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7696450621 + ... + 7696450636.

Almost surely, 2^123143210056 is an apocalyptic number.

It is an amenable number.

123143210056 is a deficient number, since it is larger than the sum of its proper divisors (107750308814).

123143210056 is a wasteful number, since it uses less digits than its factorization.

123143210056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15392901263 (or 15392901259 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 123143210056 its reverse (650012341321), we get a palindrome (773155551377).

The spelling of 123143210056 in words is "one hundred twenty-three billion, one hundred forty-three million, two hundred ten thousand, fifty-six".