133121020209 has 16 divisors (see below), whose sum is σ = 177667241088. Its totient is φ = 88661123712.

The previous prime is 133121020183. The next prime is 133121020211. The reversal of 133121020209 is 902020121331.

It is not a de Polignac number, because 133121020209 - 2²⁴ = 133104242993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133121020309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16789404 + ... + 16797330.

It is an arithmetic number, because the mean of its divisors is an integer number (11104202568).

Almost surely, 2^133121020209 is an apocalyptic number.

It is an amenable number.

133121020209 is a deficient number, since it is larger than the sum of its proper divisors (44546220879).

133121020209 is a wasteful number, since it uses less digits than its factorization.

133121020209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12664.

The product of its (nonzero) digits is 648, while the sum is 24.

The spelling of 133121020209 in words is "one hundred thirty-three billion, one hundred twenty-one million, twenty thousand, two hundred nine".