123133691901 has 16 divisors (see below), whose sum is σ = 179554713408. Its totient is φ = 74438496000.

The previous prime is 123133691897. The next prime is 123133691909. The reversal of 123133691901 is 109196331321.

It is not a de Polignac number, because 123133691901 - 2² = 123133691897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123133691901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123133691909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4686300 + ... + 4712501.

It is an arithmetic number, because the mean of its divisors is an integer number (11222169588).

Almost surely, 2^123133691901 is an apocalyptic number.

123133691901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123133691901 is a deficient number, since it is larger than the sum of its proper divisors (56421021507).

123133691901 is a wasteful number, since it uses less digits than its factorization.

123133691901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9399212.

The product of its (nonzero) digits is 26244, while the sum is 39.

The spelling of 123133691901 in words is "one hundred twenty-three billion, one hundred thirty-three million, six hundred ninety-one thousand, nine hundred one".