1001103112123 has 4 divisors (see below), whose sum is σ = 1001107547640. Its totient is φ = 1001098676608.

The previous prime is 1001103112111. The next prime is 1001103112129. The reversal of 1001103112123 is 3212113011001.

It is a happy number.

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 1001103112123 - 2⁵ = 1001103112091 is a prime.

It is a super-2 number, since 2×1001103112123² (a number of 25 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 = 1001103112097 and 1001103112106.

It is not an unprimeable number, because it can be changed into a prime (1001103112129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1859965 + ... + 2337022.

It is an arithmetic number, because the mean of its divisors is an integer number (250276886910).

Almost surely, 2^{1001103112123} is an apocalyptic number.

1001103112123 is a deficient number, since it is larger than the sum of its proper divisors (4435517).

1001103112123 is an equidigital number, since it uses as much as digits as its factorization.

1001103112123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4435516.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1001103112123 its reverse (3212113011001), we get a palindrome (4213216123124).

The spelling of 1001103112123 in words is "one trillion, one billion, one hundred three million, one hundred twelve thousand, one hundred twenty-three".