133001021999 has 4 divisors (see below), whose sum is σ = 133002868560. Its totient is φ = 132999175440.

The previous prime is 133001021983. The next prime is 133001022023. The reversal of 133001021999 is 999120100331.

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 133001021999 - 2⁴ = 133001021983 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 (133001021969) 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, 810662 + ... + 960819.

It is an arithmetic number, because the mean of its divisors is an integer number (33250717140).

Almost surely, 2^133001021999 is an apocalyptic number.

133001021999 is a deficient number, since it is larger than the sum of its proper divisors (1846561).

133001021999 is an equidigital number, since it uses as much as digits as its factorization.

133001021999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846560.

The product of its (nonzero) digits is 13122, while the sum is 38.

The spelling of 133001021999 in words is "one hundred thirty-three billion, one million, twenty-one thousand, nine hundred ninety-nine".