133212320220 has 144 divisors (see below), whose sum is σ = 447888365568. Its totient is φ = 29466299520.

The previous prime is 133212320209. The next prime is 133212320237. The reversal of 133212320220 is 22023212331.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 47 ways as a sum of consecutive naturals, for example, 639672 + ... + 821951.

It is an arithmetic number, because the mean of its divisors is an integer number (3110335872).

Almost surely, 2^133212320220 is an apocalyptic number.

133212320220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133212320220 is an abundant number, since it is smaller than the sum of its proper divisors (314676045348).

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

133212320220 is a wasteful number, since it uses less digits than its factorization.

133212320220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461680 (or 1461671 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 133212320220 its reverse (22023212331), we get a palindrome (155235532551).

The spelling of 133212320220 in words is "one hundred thirty-three billion, two hundred twelve million, three hundred twenty thousand, two hundred twenty".