133221330020 has 96 divisors (see below), whose sum is σ = 297405561600. Its totient is φ = 50021097984.

The previous prime is 133221329959. The next prime is 133221330041. The reversal of 133221330020 is 20033122331.

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 = 133221329974 and 133221330001.

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, 8282546 + ... + 8298614.

It is an arithmetic number, because the mean of its divisors is an integer number (3097974600).

Almost surely, 2^133221330020 is an apocalyptic number.

133221330020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133221330020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148702780800).

133221330020 is an abundant number, since it is smaller than the sum of its proper divisors (164184231580).

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

133221330020 is a wasteful number, since it uses less digits than its factorization.

133221330020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16437 (or 16435 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 133221330020 its reverse (20033122331), we get a palindrome (153254452351).

The spelling of 133221330020 in words is "one hundred thirty-three billion, two hundred twenty-one million, three hundred thirty thousand, twenty".