133123019999 has 4 divisors (see below), whose sum is σ = 134301099936. Its totient is φ = 131944940064.

The previous prime is 133123019989. The next prime is 133123020029. The reversal of 133123019999 is 999910321331.

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 133123019999 - 2¹⁶ = 133122954463 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 (133123019989) 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, 589039799 + ... + 589040024.

It is an arithmetic number, because the mean of its divisors is an integer number (33575274984).

Almost surely, 2^133123019999 is an apocalyptic number.

133123019999 is a deficient number, since it is larger than the sum of its proper divisors (1178079937).

133123019999 is a wasteful number, since it uses less digits than its factorization.

133123019999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178079936.

The product of its (nonzero) digits is 354294, while the sum is 50.

The spelling of 133123019999 in words is "one hundred thirty-three billion, one hundred twenty-three million, nineteen thousand, nine hundred ninety-nine".