123122113013 has 4 divisors (see below), whose sum is σ = 123123421260. Its totient is φ = 123120804768.

The previous prime is 123122113007. The next prime is 123122113019. The reversal of 123122113013 is 310311221321.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (123122113007) and next prime (123122113019).

It can be written as a sum of positive squares in 2 ways, for example, as 40924076209 + 82198036804 = 202297^2 + 286702^2 .

It is a cyclic number.

It is not a de Polignac number, because 123122113013 - 2¹⁰ = 123122111989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123122113019) 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, 501008 + ... + 705161.

It is an arithmetic number, because the mean of its divisors is an integer number (30780855315).

Almost surely, 2^123122113013 is an apocalyptic number.

It is an amenable number.

123122113013 is a deficient number, since it is larger than the sum of its proper divisors (1308247).

123122113013 is a wasteful number, since it uses less digits than its factorization.

123122113013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308246.

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

Adding to 123122113013 its reverse (310311221321), we get a palindrome (433433334334).

The spelling of 123122113013 in words is "one hundred twenty-three billion, one hundred twenty-two million, one hundred thirteen thousand, thirteen".