133123221111 has 4 divisors (see below), whose sum is σ = 177497628152. Its totient is φ = 88748814072.

The previous prime is 133123221097. The next prime is 133123221169. The reversal of 133123221111 is 111122321331.

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

It is not a de Polignac number, because 133123221111 - 2⁶ = 133123221047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133123221181) 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, 22187203516 + ... + 22187203521.

It is an arithmetic number, because the mean of its divisors is an integer number (44374407038).

Almost surely, 2^133123221111 is an apocalyptic number.

133123221111 is a deficient number, since it is larger than the sum of its proper divisors (44374407041).

133123221111 is an equidigital number, since it uses as much as digits as its factorization.

133123221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44374407040.

The product of its digits is 216, while the sum is 21.

Adding to 133123221111 its reverse (111122321331), we get a palindrome (244245542442).

The spelling of 133123221111 in words is "one hundred thirty-three billion, one hundred twenty-three million, two hundred twenty-one thousand, one hundred eleven".