211220101211 has 8 divisors (see below), whose sum is σ = 247008225024. Its totient is φ = 176835433320.

The previous prime is 211220101201. The next prime is 211220101247. The reversal of 211220101211 is 112101022112.

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

It is not a de Polignac number, because 211220101211 - 2³⁴ = 194040232027 is a prime.

It is a super-2 number, since 2×211220101211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211220101201) 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, 350863655 + ... + 350864256.

It is an arithmetic number, because the mean of its divisors is an integer number (30876028128).

Almost surely, 2^211220101211 is an apocalyptic number.

211220101211 is a deficient number, since it is larger than the sum of its proper divisors (35788123813).

211220101211 is an equidigital number, since it uses as much as digits as its factorization.

211220101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701727961.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211220101211 its reverse (112101022112), we get a palindrome (323321123323).

The spelling of 211220101211 in words is "two hundred eleven billion, two hundred twenty million, one hundred one thousand, two hundred eleven".