133221311331 has 4 divisors (see below), whose sum is σ = 177628415112. Its totient is φ = 88814207552.

The previous prime is 133221311329. The next prime is 133221311339. The reversal of 133221311331 is 133113122331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133221311331 - 2¹ = 133221311329 is a prime.

It is a super-2 number, since 2×133221311331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133221311339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22203551886 + ... + 22203551891.

It is an arithmetic number, because the mean of its divisors is an integer number (44407103778).

Almost surely, 2^133221311331 is an apocalyptic number.

133221311331 is a deficient number, since it is larger than the sum of its proper divisors (44407103781).

133221311331 is an equidigital number, since it uses as much as digits as its factorization.

133221311331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44407103780.

The product of its digits is 972, while the sum is 24.

Adding to 133221311331 its reverse (133113122331), we get a palindrome (266334433662).

The spelling of 133221311331 in words is "one hundred thirty-three billion, two hundred twenty-one million, three hundred eleven thousand, three hundred thirty-one".