211121220111211 has 8 divisors (see below), whose sum is σ = 211903393336704. Its totient is φ = 210339777551040.

The previous prime is 211121220111209. The next prime is 211121220111239. The reversal of 211121220111211 is 112111022121112.

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 211121220111211 - 2¹ = 211121220111209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211121220111311) 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, 182087370 + ... + 183243151.

It is an arithmetic number, because the mean of its divisors is an integer number (26487924167088).

Almost surely, 2^{211121220111211} is an apocalyptic number.

211121220111211 is a deficient number, since it is larger than the sum of its proper divisors (782173225493).

211121220111211 is a wasteful number, since it uses less digits than its factorization.

211121220111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365332661.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 211121220111211 its reverse (112111022121112), we get a palindrome (323232242232323).

The spelling of 211121220111211 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twenty million, one hundred eleven thousand, two hundred eleven".