133123111 has 12 divisors (see below), whose sum is σ = 146607496. Its totient is φ = 120787920.

The previous prime is 133123099. The next prime is 133123157. The reversal of 133123111 is 111321331.

It is not a de Polignac number, because 133123111 - 2¹¹ = 133121063 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 (133123181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109141 + ... + 110353.

Almost surely, 2^133123111 is an apocalyptic number.

133123111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133123111 is a deficient number, since it is larger than the sum of its proper divisors (13484385).

133123111 is a wasteful number, since it uses less digits than its factorization.

133123111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142 (or 2131 counting only the distinct ones).

The product of its digits is 54, while the sum is 16.

The square root of 133123111 is about 11537.8988988464. The cubic root of 133123111 is about 510.6043214361.

Adding to 133123111 its reverse (111321331), we get a palindrome (244444442).

It can be divided in two parts, 1331 and 23111, that added together give a palindrome (24442).

The spelling of 133123111 in words is "one hundred thirty-three million, one hundred twenty-three thousand, one hundred eleven".