133212323220 has 192 divisors, whose sum is σ = 400745028096. Its totient is φ = 32976599040.

The previous prime is 133212323219. The next prime is 133212323239. The reversal of 133212323220 is 22323212331.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21493162 + ... + 21499358.

It is an arithmetic number, because the mean of its divisors is an integer number (2087213688).

Almost surely, 2^133212323220 is an apocalyptic number.

133212323220 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 133212323220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200372514048).

133212323220 is an abundant number, since it is smaller than the sum of its proper divisors (267532704876).

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

133212323220 is a wasteful number, since it uses less digits than its factorization.

133212323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6690 (or 6688 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 133212323220 its reverse (22323212331), we get a palindrome (155535535551).

The spelling of 133212323220 in words is "one hundred thirty-three billion, two hundred twelve million, three hundred twenty-three thousand, two hundred twenty".