123133213013 has 4 divisors (see below), whose sum is σ = 123283193388. Its totient is φ = 122983232640.

The previous prime is 123133213003. The next prime is 123133213019. The reversal of 123133213013 is 310312331321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310312331321 = 83 ⋅3738702787.

It can be written as a sum of positive squares in 2 ways, for example, as 43968637969 + 79164575044 = 209687^2 + 281362^2 .

It is a cyclic number.

It is not a de Polignac number, because 123133213013 - 2⁶ = 123133212949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123133213013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123133213019) 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, 74988956 + ... + 74990597.

It is an arithmetic number, because the mean of its divisors is an integer number (30820798347).

Almost surely, 2^123133213013 is an apocalyptic number.

It is an amenable number.

123133213013 is a deficient number, since it is larger than the sum of its proper divisors (149980375).

123133213013 is an equidigital number, since it uses as much as digits as its factorization.

123133213013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149980374.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 123133213013 its reverse (310312331321), we get a palindrome (433445544334).

The spelling of 123133213013 in words is "one hundred twenty-three billion, one hundred thirty-three million, two hundred thirteen thousand, thirteen".