211221220221211 has 8 divisors (see below), whose sum is σ = 214082600757264. Its totient is φ = 208374939319200.

The previous prime is 211221220221191. The next prime is 211221220221223. The reversal of 211221220221211 is 112122022122112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211221220221211 is a prime.

It is a super-2 number, since 2×211221220221211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211221220231211) 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, 3774880345 + ... + 3774936298.

It is an arithmetic number, because the mean of its divisors is an integer number (26760325094658).

Almost surely, 2^{211221220221211} is an apocalyptic number.

211221220221211 is a deficient number, since it is larger than the sum of its proper divisors (2861380536053).

211221220221211 is a wasteful number, since it uses less digits than its factorization.

211221220221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7549817021.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 211221220221211 its reverse (112122022122112), we get a palindrome (323343242343323).

The spelling of 211221220221211 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred twenty million, two hundred twenty-one thousand, two hundred eleven".