13123020132121 has 4 divisors (see below), whose sum is σ = 13894962492852. Its totient is φ = 12351077771392.

The previous prime is 13123020132091. The next prime is 13123020132127. The reversal of 13123020132121 is 12123102032131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9297553557721 + 3825466574400 = 3049189^2 + 1955880^2 .

It is a cyclic number.

It is not a de Polignac number, because 13123020132121 - 2⁷ = 13123020131993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13123020132092 and 13123020132101.

It is not an unprimeable number, because it can be changed into a prime (13123020132127) 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, 385971180340 + ... + 385971180373.

It is an arithmetic number, because the mean of its divisors is an integer number (3473740623213).

Almost surely, 2^{13123020132121} is an apocalyptic number.

It is an amenable number.

13123020132121 is a deficient number, since it is larger than the sum of its proper divisors (771942360731).

13123020132121 is an equidigital number, since it uses as much as digits as its factorization.

13123020132121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771942360730.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 13123020132121 its reverse (12123102032131), we get a palindrome (25246122164252).

The spelling of 13123020132121 in words is "thirteen trillion, one hundred twenty-three billion, twenty million, one hundred thirty-two thousand, one hundred twenty-one".