10001312123 has 4 divisors (see below), whose sum is σ = 10910522328. Its totient is φ = 9092101920.

The previous prime is 10001312119. The next prime is 10001312129. The reversal of 10001312123 is 32121310001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32121310001 = 11 ⋅2920119091.

It is not a de Polignac number, because 10001312123 - 2² = 10001312119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001312098 and 10001312107.

It is not an unprimeable number, because it can be changed into a prime (10001312129) 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, 454605086 + ... + 454605107.

It is an arithmetic number, because the mean of its divisors is an integer number (2727630582).

Almost surely, 2^10001312123 is an apocalyptic number.

10001312123 is a deficient number, since it is larger than the sum of its proper divisors (909210205).

10001312123 is an equidigital number, since it uses as much as digits as its factorization.

10001312123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909210204.

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

Adding to 10001312123 its reverse (32121310001), we get a palindrome (42122622124).

The spelling of 10001312123 in words is "ten billion, one million, three hundred twelve thousand, one hundred twenty-three".