13123131020121 has 16 divisors (see below), whose sum is σ = 17519630486400. Its totient is φ = 8737693396608.

The previous prime is 13123131020089. The next prime is 13123131020239. The reversal of 13123131020121 is 12102013132131.

It is not a de Polignac number, because 13123131020121 - 2⁵ = 13123131020089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13123131022121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136269175 + ... + 136365443.

It is an arithmetic number, because the mean of its divisors is an integer number (1094976905400).

Almost surely, 2^{13123131020121} is an apocalyptic number.

It is an amenable number.

13123131020121 is a deficient number, since it is larger than the sum of its proper divisors (4396499466279).

13123131020121 is an equidigital number, since it uses as much as digits as its factorization.

13123131020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153248.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 13123131020121 its reverse (12102013132131), we get a palindrome (25225144152252).

The spelling of 13123131020121 in words is "thirteen trillion, one hundred twenty-three billion, one hundred thirty-one million, twenty thousand, one hundred twenty-one".