202121110001009 has 16 divisors (see below), whose sum is σ = 204147364861440. Its totient is φ = 200098003656960.

The previous prime is 202121110001003. The next prime is 202121110001071. The reversal of 202121110001009 is 900100011121202.

It is a de Polignac number, because none of the positive numbers 2^k-202121110001009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202121110001003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2347172864 + ... + 2347258974.

It is an arithmetic number, because the mean of its divisors is an integer number (12759210303840).

Almost surely, 2^{202121110001009} is an apocalyptic number.

It is an amenable number.

202121110001009 is a deficient number, since it is larger than the sum of its proper divisors (2026254860431).

202121110001009 is a wasteful number, since it uses less digits than its factorization.

202121110001009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104120.

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

The spelling of 202121110001009 in words is "two hundred two trillion, one hundred twenty-one billion, one hundred ten million, one thousand, nine".