13133221020 has 72 divisors (see below), whose sum is σ = 39905624304. Its totient is φ = 3496197888.

The previous prime is 13133220979. The next prime is 13133221033. The reversal of 13133221020 is 2012233131.

13133221020 is a `hidden beast` number, since 1 + 313 + 322 + 10 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13133220984 and 13133221002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43512 + ... + 167808.

It is an arithmetic number, because the mean of its divisors is an integer number (554244782).

Almost surely, 2^13133221020 is an apocalyptic number.

13133221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13133221020 is an abundant number, since it is smaller than the sum of its proper divisors (26772403284).

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

13133221020 is a wasteful number, since it uses less digits than its factorization.

13133221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124899 (or 124894 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 13133221020 its reverse (2012233131), we get a palindrome (15145454151).

The spelling of 13133221020 in words is "thirteen billion, one hundred thirty-three million, two hundred twenty-one thousand, twenty".