20123133113213 has 8 divisors (see below), whose sum is σ = 21675481056600. Its totient is φ = 18571415830848.

The previous prime is 20123133113201. The next prime is 20123133113227. The reversal of 20123133113213 is 31231133132102.

It can be written as a sum of positive squares in 4 ways, for example, as 4893572228164 + 15229560885049 = 2212142^2 + 3902507^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20123133113213 - 2¹⁸ = 20123132851069 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 (20123133163213) 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 7 ways as a sum of consecutive naturals, for example, 157598978 + ... + 157726611.

It is an arithmetic number, because the mean of its divisors is an integer number (2709435132075).

Almost surely, 2^{20123133113213} is an apocalyptic number.

It is an amenable number.

20123133113213 is a deficient number, since it is larger than the sum of its proper divisors (1552347943387).

20123133113213 is a wasteful number, since it uses less digits than its factorization.

20123133113213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315330511.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 20123133113213 its reverse (31231133132102), we get a palindrome (51354266245315).

The spelling of 20123133113213 in words is "twenty trillion, one hundred twenty-three billion, one hundred thirty-three million, one hundred thirteen thousand, two hundred thirteen".