133020321231 has 8 divisors (see below), whose sum is σ = 202697632384. Its totient is φ = 76011612120.

The previous prime is 133020321223. The next prime is 133020321263. The reversal of 133020321231 is 132123020331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133020321231 - 2³ = 133020321223 is a prime.

It is a super-2 number, since 2×133020321231² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 6334301011 = 133020321231 / (1 + 3 + 3 + 0 + 2 + 0 + 3 + 2 + 1 + 2 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133020321198 and 133020321207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133020321631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3167150485 + ... + 3167150526.

It is an arithmetic number, because the mean of its divisors is an integer number (25337204048).

Almost surely, 2^133020321231 is an apocalyptic number.

133020321231 is a deficient number, since it is larger than the sum of its proper divisors (69677311153).

133020321231 is an equidigital number, since it uses as much as digits as its factorization.

133020321231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6334301021.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 133020321231 its reverse (132123020331), we get a palindrome (265143341562).

The spelling of 133020321231 in words is "one hundred thirty-three billion, twenty million, three hundred twenty-one thousand, two hundred thirty-one".