133012220 has 96 divisors (see below), whose sum is σ = 322430976. Its totient is φ = 45619200.

The previous prime is 133012213. The next prime is 133012223. The reversal of 133012220 is 22210331.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 133012195 and 133012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133012223) 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 31 ways as a sum of consecutive naturals, for example, 490685 + ... + 490955.

It is an arithmetic number, because the mean of its divisors is an integer number (3358656).

Almost surely, 2^133012220 is an apocalyptic number.

133012220 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 133012220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161215488).

133012220 is an abundant number, since it is smaller than the sum of its proper divisors (189418756).

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

133012220 is a wasteful number, since it uses less digits than its factorization.

133012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 133012220 is about 11533.0923866932. The cubic root of 133012220 is about 510.4625049564.

Adding to 133012220 its reverse (22210331), we get a palindrome (155222551).

The spelling of 133012220 in words is "one hundred thirty-three million, twelve thousand, two hundred twenty".