133212020 has 12 divisors (see below), whose sum is σ = 279745284. Its totient is φ = 53284800.

The previous prime is 133212011. The next prime is 133212041. The reversal of 133212020 is 20212331.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 59320804 + 73891216 = 7702^2 + 8596^2 .

It is a junction number, because it is equal to n+sod(n) for n = 133211986 and 133212004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3330281 + ... + 3330320.

It is an arithmetic number, because the mean of its divisors is an integer number (23312107).

Almost surely, 2^133212020 is an apocalyptic number.

133212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133212020 is an abundant number, since it is smaller than the sum of its proper divisors (146533264).

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

133212020 is a wasteful number, since it uses less digits than its factorization.

133212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6660610 (or 6660608 counting only the distinct ones).

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

The square root of 133212020 is about 11541.7511669590. The cubic root of 133212020 is about 510.7179686621.

Adding to 133212020 its reverse (20212331), we get a palindrome (153424351).

The spelling of 133212020 in words is "one hundred thirty-three million, two hundred twelve thousand, twenty".