200021211109 has 4 divisors (see below), whose sum is σ = 201036547404. Its totient is φ = 199005874816.

The previous prime is 200021211079. The next prime is 200021211113. The reversal of 200021211109 is 901112120002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119009820484 + 81011390625 = 344978^2 + 284625^2 .

It is a cyclic number.

It is not a de Polignac number, because 200021211109 - 2¹³ = 200021202917 is a prime.

It is a super-2 number, since 2×200021211109² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200021211179) 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, 507667852 + ... + 507668245.

It is an arithmetic number, because the mean of its divisors is an integer number (50259136851).

Almost surely, 2^200021211109 is an apocalyptic number.

It is an amenable number.

200021211109 is a deficient number, since it is larger than the sum of its proper divisors (1015336295).

200021211109 is a wasteful number, since it uses less digits than its factorization.

200021211109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015336294.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 200021211109 in words is "two hundred billion, twenty-one million, two hundred eleven thousand, one hundred nine".