123311100005 has 16 divisors (see below), whose sum is σ = 159560452800. Its totient is φ = 91177395840.

The previous prime is 123311099999. The next prime is 123311100083. The reversal of 123311100005 is 500001113321.

It is not a de Polignac number, because 123311100005 - 2¹⁸ = 123310837861 is a prime.

It is a super-2 number, since 2×123311100005² (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 15 ways as a sum of consecutive naturals, for example, 15825515 + ... + 15833304.

It is an arithmetic number, because the mean of its divisors is an integer number (9972528300).

Almost surely, 2^123311100005 is an apocalyptic number.

It is an amenable number.

123311100005 is a deficient number, since it is larger than the sum of its proper divisors (36249352795).

123311100005 is a wasteful number, since it uses less digits than its factorization.

123311100005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31658884.

The product of its (nonzero) digits is 90, while the sum is 17.

Adding to 123311100005 its reverse (500001113321), we get a palindrome (623312213326).

The spelling of 123311100005 in words is "one hundred twenty-three billion, three hundred eleven million, one hundred thousand, five".