100001231123 has 4 divisors (see below), whose sum is σ = 100037374560. Its totient is φ = 99965087688.

The previous prime is 100001231107. The next prime is 100001231131. The reversal of 100001231123 is 321132100001.

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

It is a cyclic number.

It is not a de Polignac number, because 100001231123 - 2⁴ = 100001231107 is a prime.

It is a super-2 number, since 2×100001231123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100001231098 and 100001231107.

It is not an unprimeable number, because it can be changed into a prime (100001221123) 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, 18067568 + ... + 18073101.

It is an arithmetic number, because the mean of its divisors is an integer number (25009343640).

Almost surely, 2^100001231123 is an apocalyptic number.

100001231123 is a deficient number, since it is larger than the sum of its proper divisors (36143437).

100001231123 is an equidigital number, since it uses as much as digits as its factorization.

100001231123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36143436.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 100001231123 its reverse (321132100001), we get a palindrome (421133331124).

The spelling of 100001231123 in words is "one hundred billion, one million, two hundred thirty-one thousand, one hundred twenty-three".