13111231312020 has 48 divisors (see below), whose sum is σ = 36851034971520. Its totient is φ = 3483034321536.

The previous prime is 13111231312009. The next prime is 13111231312021. The reversal of 13111231312020 is 2021313211131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111231312021) 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, 415422475 + ... + 415454034.

It is an arithmetic number, because the mean of its divisors is an integer number (767729895240).

Almost surely, 2^{13111231312020} is an apocalyptic number.

13111231312020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13111231312020 is an abundant number, since it is smaller than the sum of its proper divisors (23739803659500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13111231312020 is a wasteful number, since it uses less digits than its factorization.

13111231312020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830876784 (or 830876782 counting only the distinct ones).

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

Adding to 13111231312020 its reverse (2021313211131), we get a palindrome (15132544523151).

The spelling of 13111231312020 in words is "thirteen trillion, one hundred eleven billion, two hundred thirty-one million, three hundred twelve thousand, twenty".