201121110020009 has 4 divisors (see below), whose sum is σ = 201217478546304. Its totient is φ = 201024741493716.

The previous prime is 201121110020003. The next prime is 201121110020027. The reversal of 201121110020009 is 900020011121102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201121110020009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201121110020003) 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, 48184260017 + ... + 48184264190.

It is an arithmetic number, because the mean of its divisors is an integer number (50304369636576).

Almost surely, 2^{201121110020009} is an apocalyptic number.

It is an amenable number.

201121110020009 is a deficient number, since it is larger than the sum of its proper divisors (96368526295).

201121110020009 is an equidigital number, since it uses as much as digits as its factorization.

201121110020009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96368526294.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 201121110020009 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred ten million, twenty thousand, nine".