133231312121220 has 144 divisors (see below), whose sum is σ = 411664820216832. Its totient is φ = 34870873847040.

The previous prime is 133231312121209. The next prime is 133231312121263. The reversal of 133231312121220 is 22121213132331.

133231312121220 is a `hidden beast` number, since 1 + 3 + 3 + 2 + 3 + 1 + 312 + 121 + 220 = 666.

133231312121220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 20524467 + ... + 26224346.

It is an arithmetic number, because the mean of its divisors is an integer number (2858783473728).

Almost surely, 2^{133231312121220} is an apocalyptic number.

133231312121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133231312121220 is an abundant number, since it is smaller than the sum of its proper divisors (278433508095612).

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

133231312121220 is a wasteful number, since it uses less digits than its factorization.

133231312121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46749122 (or 46749117 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 133231312121220 its reverse (22121213132331), we get a palindrome (155352525253551).

The spelling of 133231312121220 in words is "one hundred thirty-three trillion, two hundred thirty-one billion, three hundred twelve million, one hundred twenty-one thousand, two hundred twenty".