211827301009 has 3 divisors (see below), whose sum is σ = 211827761257. Its totient is φ = 211826840762.

The previous prime is 211827300989. The next prime is 211827301013. The reversal of 211827301009 is 900103728112.

The square root of 211827301009 is 460247.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 211827301009 - 2¹¹ = 211827298961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211827301079) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 230124 + ... + 690370.

Almost surely, 2^211827301009 is an apocalyptic number.

211827301009 is the 460247-th square number.

211827301009 is the 230124-th centered octagonal number.

It is an amenable number.

211827301009 is a deficient number, since it is larger than the sum of its proper divisors (460248).

211827301009 is an frugal number, since it uses more digits than its factorization.

211827301009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920494 (or 460247 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The spelling of 211827301009 in words is "two hundred eleven billion, eight hundred twenty-seven million, three hundred one thousand, nine".