211244916321 has 12 divisors (see below), whose sum is σ = 309311430948. Its totient is φ = 138900766464.

The previous prime is 211244916313. The next prime is 211244916347. The reversal of 211244916321 is 123619442112.

211244916321 is a `hidden beast` number, since 2 + 1 + 1 + 244 + 91 + 6 + 321 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 59172995025 + 152071921296 = 243255^2 + 389964^2 .

It is not a de Polignac number, because 211244916321 - 2³ = 211244916313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211244916391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160764120 + ... + 160765433.

It is an arithmetic number, because the mean of its divisors is an integer number (25775952579).

Almost surely, 2^211244916321 is an apocalyptic number.

It is an amenable number.

211244916321 is a deficient number, since it is larger than the sum of its proper divisors (98066514627).

211244916321 is a wasteful number, since it uses less digits than its factorization.

211244916321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321529632 (or 321529629 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The spelling of 211244916321 in words is "two hundred eleven billion, two hundred forty-four million, nine hundred sixteen thousand, three hundred twenty-one".