133213220331 has 4 divisors (see below), whose sum is σ = 177617627112. Its totient is φ = 88808813552.

The previous prime is 133213220321. The next prime is 133213220347. The reversal of 133213220331 is 133022312331.

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 133213220331 - 2¹¹ = 133213218283 is a prime.

It is a super-2 number, since 2×133213220331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133213220321) 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, 22202203386 + ... + 22202203391.

It is an arithmetic number, because the mean of its divisors is an integer number (44404406778).

Almost surely, 2^133213220331 is an apocalyptic number.

133213220331 is a deficient number, since it is larger than the sum of its proper divisors (44404406781).

133213220331 is an equidigital number, since it uses as much as digits as its factorization.

133213220331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44404406780.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 133213220331 its reverse (133022312331), we get a palindrome (266235532662).

The spelling of 133213220331 in words is "one hundred thirty-three billion, two hundred thirteen million, two hundred twenty thousand, three hundred thirty-one".