133231011111 has 64 divisors (see below), whose sum is σ = 225009792000. Its totient is φ = 77123629440.

The previous prime is 133231011079. The next prime is 133231011119. The reversal of 133231011111 is 111110132331.

133231011111 is a `hidden beast` number, since 1 + 332 + 310 + 1 + 11 + 11 = 666.

It is not a de Polignac number, because 133231011111 - 2⁵ = 133231011079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133231011119) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4829425 + ... + 4856933.

It is an arithmetic number, because the mean of its divisors is an integer number (3515778000).

Almost surely, 2^133231011111 is an apocalyptic number.

133231011111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133231011111 is a deficient number, since it is larger than the sum of its proper divisors (91778780889).

133231011111 is a wasteful number, since it uses less digits than its factorization.

133231011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28261 (or 28255 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 133231011111 its reverse (111110132331), we get a palindrome (244341143442).

The spelling of 133231011111 in words is "one hundred thirty-three billion, two hundred thirty-one million, eleven thousand, one hundred eleven".