133023021220 has 24 divisors (see below), whose sum is σ = 279391404600. Its totient is φ = 53201006592.

The previous prime is 133023021211. The next prime is 133023021227. The reversal of 133023021220 is 22120320331.

It can be written as a sum of positive squares in 4 ways, for example, as 10965021796 + 122057999424 = 104714^2 + 349368^2 .

It is not an unprimeable number, because it can be changed into a prime (133023021227) 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 7 ways as a sum of consecutive naturals, for example, 378775 + ... + 639934.

It is an arithmetic number, because the mean of its divisors is an integer number (11641308525).

Almost surely, 2^133023021220 is an apocalyptic number.

133023021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133023021220 is an abundant number, since it is smaller than the sum of its proper divisors (146368383380).

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

133023021220 is a wasteful number, since it uses less digits than its factorization.

133023021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025247 (or 1025245 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 133023021220 its reverse (22120320331), we get a palindrome (155143341551).

The spelling of 133023021220 in words is "one hundred thirty-three billion, twenty-three million, twenty-one thousand, two hundred twenty".