211022221211 has 8 divisors (see below), whose sum is σ = 212710700544. Its totient is φ = 209334162240.

The previous prime is 211022221183. The next prime is 211022221247. The reversal of 211022221211 is 112122220112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211022221211 - 2³⁰ = 209948479387 is a prime.

It is a super-4 number, since 4×211022221211⁴ (a number of 46 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211022221211.

It is not an unprimeable number, because it can be changed into a prime (211022221411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 944681 + ... + 1146501.

It is an arithmetic number, because the mean of its divisors is an integer number (26588837568).

Almost surely, 2^211022221211 is an apocalyptic number.

211022221211 is a deficient number, since it is larger than the sum of its proper divisors (1688479333).

211022221211 is a wasteful number, since it uses less digits than its factorization.

211022221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210181.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211022221211 its reverse (112122220112), we get a palindrome (323144441323).

The spelling of 211022221211 in words is "two hundred eleven billion, twenty-two million, two hundred twenty-one thousand, two hundred eleven".