4013123012123 has 4 divisors (see below), whose sum is σ = 4052085371568. Its totient is φ = 3974160652680.

The previous prime is 4013123012081. The next prime is 4013123012131. The reversal of 4013123012123 is 3212103213104.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4013123012123 is a prime.

It is a super-2 number, since 2×4013123012123² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4013123012183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19481179568 + ... + 19481179773.

It is an arithmetic number, because the mean of its divisors is an integer number (1013021342892).

Almost surely, 2^{4013123012123} is an apocalyptic number.

4013123012123 is a deficient number, since it is larger than the sum of its proper divisors (38962359445).

4013123012123 is a wasteful number, since it uses less digits than its factorization.

4013123012123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38962359444.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 4013123012123 its reverse (3212103213104), we get a palindrome (7225226225227).

The spelling of 4013123012123 in words is "four trillion, thirteen billion, one hundred twenty-three million, twelve thousand, one hundred twenty-three".