133123021220 has 48 divisors (see below), whose sum is σ = 319516928640. Its totient is φ = 45639081984.

The previous prime is 133123021169. The next prime is 133123021223. The reversal of 133123021220 is 22120321331.

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 = 133123021192 and 133123021201.

It is not an unprimeable number, because it can be changed into a prime (133123021223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3169316 + ... + 3211044.

It is an arithmetic number, because the mean of its divisors is an integer number (6656602680).

Almost surely, 2^133123021220 is an apocalyptic number.

133123021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133123021220 is an abundant number, since it is smaller than the sum of its proper divisors (186393907420).

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

133123021220 is a wasteful number, since it uses less digits than its factorization.

133123021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64532 (or 64530 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 133123021220 its reverse (22120321331), we get a palindrome (155243342551).

The spelling of 133123021220 in words is "one hundred thirty-three billion, one hundred twenty-three million, twenty-one thousand, two hundred twenty".