211121213311 has 8 divisors (see below), whose sum is σ = 211515189920. Its totient is φ = 210727399392.

The previous prime is 211121213299. The next prime is 211121213341. The reversal of 211121213311 is 113312121112.

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 211121213311 - 2⁵ = 211121213279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121213341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2732041 + ... + 2808253.

It is an arithmetic number, because the mean of its divisors is an integer number (26439398740).

Almost surely, 2^211121213311 is an apocalyptic number.

211121213311 is a deficient number, since it is larger than the sum of its proper divisors (393976609).

211121213311 is an equidigital number, since it uses as much as digits as its factorization.

211121213311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81345.

The product of its digits is 72, while the sum is 19.

Adding to 211121213311 its reverse (113312121112), we get a palindrome (324433334423).

The spelling of 211121213311 in words is "two hundred eleven billion, one hundred twenty-one million, two hundred thirteen thousand, three hundred eleven".