13121110020 has 48 divisors (see below), whose sum is σ = 36745410240. Its totient is φ = 3498362496.

The previous prime is 13121109977. The next prime is 13121110033. The reversal of 13121110020 is 2001112131.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 13121109978 and 13121110005.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 417994 + ... + 448286.

It is an arithmetic number, because the mean of its divisors is an integer number (765529380).

Almost surely, 2^13121110020 is an apocalyptic number.

13121110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13121110020 is an abundant number, since it is smaller than the sum of its proper divisors (23624300220).

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

13121110020 is a wasteful number, since it uses less digits than its factorization.

13121110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37524 (or 37522 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 13121110020 its reverse (2001112131), we get a palindrome (15122222151).

The spelling of 13121110020 in words is "thirteen billion, one hundred twenty-one million, one hundred ten thousand, twenty".