211121111010211 has 4 divisors (see below), whose sum is σ = 211121395761672. Its totient is φ = 211120826258752.

The previous prime is 211121111010181. The next prime is 211121111010253. The reversal of 211121111010211 is 112010111121112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211121111010211 - 2⁷ = 211121111010083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211121111080211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141260686 + ... + 142747411.

It is an arithmetic number, because the mean of its divisors is an integer number (52780348940418).

Almost surely, 2^{211121111010211} is an apocalyptic number.

211121111010211 is a deficient number, since it is larger than the sum of its proper divisors (284751461).

211121111010211 is an equidigital number, since it uses as much as digits as its factorization.

211121111010211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284751460.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 211121111010211 its reverse (112010111121112), we get a palindrome (323131222131323).

The spelling of 211121111010211 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred eleven million, ten thousand, two hundred eleven".