13121333210020 has 48 divisors (see below), whose sum is σ = 31493819081088. Its totient is φ = 4498368618240.

The previous prime is 13121333209991. The next prime is 13121333210021. The reversal of 13121333210020 is 2001233312131.

It is a junction number, because it is equal to n+sod(n) for n = 13121333209973 and 13121333210000.

It is not an unprimeable number, because it can be changed into a prime (13121333210021) 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, 2206122 + ... + 5577601.

It is an arithmetic number, because the mean of its divisors is an integer number (656121230856).

Almost surely, 2^{13121333210020} is an apocalyptic number.

13121333210020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13121333210020 is an abundant number, since it is smaller than the sum of its proper divisors (18372485871068).

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

13121333210020 is a wasteful number, since it uses less digits than its factorization.

13121333210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7795780 (or 7795778 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 13121333210020 its reverse (2001233312131), we get a palindrome (15122566522151).

The spelling of 13121333210020 in words is "thirteen trillion, one hundred twenty-one billion, three hundred thirty-three million, two hundred ten thousand, twenty".