133220321320 has 64 divisors (see below), whose sum is σ = 310195468800. Its totient is φ = 51439069440.

The previous prime is 133220321317. The next prime is 133220321323. The reversal of 133220321320 is 23123022331.

It is an interprime number because it is at equal distance from previous prime (133220321317) and next prime (133220321323).

It is a junction number, because it is equal to n+sod(n) for n = 133220321291 and 133220321300.

It is not an unprimeable number, because it can be changed into a prime (133220321323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356971 + ... + 627589.

It is an arithmetic number, because the mean of its divisors is an integer number (4846804200).

Almost surely, 2^133220321320 is an apocalyptic number.

133220321320 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 133220321320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155097734400).

133220321320 is an abundant number, since it is smaller than the sum of its proper divisors (176975147480).

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

133220321320 is a wasteful number, since it uses less digits than its factorization.

133220321320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271058 (or 271054 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 133220321320 its reverse (23123022331), we get a palindrome (156343343651).

The spelling of 133220321320 in words is "one hundred thirty-three billion, two hundred twenty million, three hundred twenty-one thousand, three hundred twenty".