20121033033209 has 32 divisors (see below), whose sum is σ = 21669960533760. Its totient is φ = 18635415884800.

The previous prime is 20121033033203. The next prime is 20121033033247. The reversal of 20121033033209 is 90233033012102.

It is a cyclic number.

It is not a de Polignac number, because 20121033033209 - 2⁴ = 20121033033193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20121033033203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 648652502 + ... + 648683520.

It is an arithmetic number, because the mean of its divisors is an integer number (677186266680).

Almost surely, 2^{20121033033209} is an apocalyptic number.

It is an amenable number.

20121033033209 is a deficient number, since it is larger than the sum of its proper divisors (1548927500551).

20121033033209 is a wasteful number, since it uses less digits than its factorization.

20121033033209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36241.

The product of its (nonzero) digits is 5832, while the sum is 29.

The spelling of 20121033033209 in words is "twenty trillion, one hundred twenty-one billion, thirty-three million, thirty-three thousand, two hundred nine".