1013123012123 has 4 divisors (see below), whose sum is σ = 1013382060528. Its totient is φ = 1012863963720.

The previous prime is 1013123012119. The next prime is 1013123012189. The reversal of 1013123012123 is 3212103213101.

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 1013123012123 - 2² = 1013123012119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1013123012095 and 1013123012104.

It is not an unprimeable number, because it can be changed into a prime (1013123012113) 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, 129518336 + ... + 129526157.

It is an arithmetic number, because the mean of its divisors is an integer number (253345515132).

Almost surely, 2^{1013123012123} is an apocalyptic number.

1013123012123 is a deficient number, since it is larger than the sum of its proper divisors (259048405).

1013123012123 is an equidigital number, since it uses as much as digits as its factorization.

1013123012123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259048404.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1013123012123 its reverse (3212103213101), we get a palindrome (4225226225224).

The spelling of 1013123012123 in words is "one trillion, thirteen billion, one hundred twenty-three million, twelve thousand, one hundred twenty-three".