20123211330013 has 6 divisors (see below), whose sum is σ = 22118901709982. Its totient is φ = 18293828481720.

The previous prime is 20123211330007. The next prime is 20123211330017. The reversal of 20123211330013 is 31003311232102.

It can be written as a sum of positive squares in only one way, i.e., 20120625302404 + 2586027609 = 4485602^2 + 50853^2 .

It is not a de Polignac number, because 20123211330013 - 2²⁹ = 20122674459101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123211330017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83153765706 + ... + 83153765947.

Almost surely, 2^{20123211330013} is an apocalyptic number.

It is an amenable number.

20123211330013 is a deficient number, since it is larger than the sum of its proper divisors (1995690379969).

20123211330013 is a wasteful number, since it uses less digits than its factorization.

20123211330013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166307531675 (or 166307531664 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 20123211330013 its reverse (31003311232102), we get a palindrome (51126522562115).

The spelling of 20123211330013 in words is "twenty trillion, one hundred twenty-three billion, two hundred eleven million, three hundred thirty thousand, thirteen".