13121133210020 has 96 divisors (see below), whose sum is σ = 30124028995200. Its totient is φ = 4761054028800.

The previous prime is 13121133210001. The next prime is 13121133210067. The reversal of 13121133210020 is 2001233112131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13121133209974 and 13121133210001.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1018003736 + ... + 1018016624.

It is an arithmetic number, because the mean of its divisors is an integer number (313791968700).

Almost surely, 2^{13121133210020} is an apocalyptic number.

13121133210020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13121133210020 is an abundant number, since it is smaller than the sum of its proper divisors (17002895785180).

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

13121133210020 is a wasteful number, since it uses less digits than its factorization.

13121133210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22509 (or 22507 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 13121133210020 its reverse (2001233112131), we get a palindrome (15122366322151).

The spelling of 13121133210020 in words is "thirteen trillion, one hundred twenty-one billion, one hundred thirty-three million, two hundred ten thousand, twenty".