133212021020 has 24 divisors (see below), whose sum is σ = 301264109664. Its totient is φ = 49185976896.

The previous prime is 133212020999. The next prime is 133212021031. The reversal of 133212021020 is 20120212331.

It is a self number, because there is not a number n which added to its sum of digits gives 133212021020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256176704 + ... + 256177223.

It is an arithmetic number, because the mean of its divisors is an integer number (12552671236).

Almost surely, 2^133212021020 is an apocalyptic number.

133212021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133212021020 is an abundant number, since it is smaller than the sum of its proper divisors (168052088644).

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

133212021020 is a wasteful number, since it uses less digits than its factorization.

133212021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512353949 (or 512353947 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 133212021020 its reverse (20120212331), we get a palindrome (153332233351).

The spelling of 133212021020 in words is "one hundred thirty-three billion, two hundred twelve million, twenty-one thousand, twenty".