123110345405 has 8 divisors (see below), whose sum is σ = 147738903000. Its totient is φ = 98483950656.

The previous prime is 123110345377. The next prime is 123110345419. The reversal of 123110345405 is 504543011321.

It can be written as a sum of positive squares in 4 ways, for example, as 24397502809 + 98712842596 = 156197^2 + 314186^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 123110345405 - 2¹² = 123110341309 is a prime.

It is a super-2 number, since 2×123110345405² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412730 + ... + 645419.

It is an arithmetic number, because the mean of its divisors is an integer number (18467362875).

Almost surely, 2^123110345405 is an apocalyptic number.

It is an amenable number.

123110345405 is a deficient number, since it is larger than the sum of its proper divisors (24628557595).

123110345405 is a wasteful number, since it uses less digits than its factorization.

123110345405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081423.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 123110345405 its reverse (504543011321), we get a palindrome (627653356726).

The spelling of 123110345405 in words is "one hundred twenty-three billion, one hundred ten million, three hundred forty-five thousand, four hundred five".