211120212212221 has 16 divisors (see below), whose sum is σ = 227492950474944. Its totient is φ = 194766455862144.

The previous prime is 211120212212209. The next prime is 211120212212291. The reversal of 211120212212221 is 122212212021112.

It is a cyclic number.

It is not a de Polignac number, because 211120212212221 - 2⁴³ = 202324119190013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211120212212192 and 211120212212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211120212212291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236537430 + ... + 237428296.

It is an arithmetic number, because the mean of its divisors is an integer number (14218309404684).

Almost surely, 2^{211120212212221} is an apocalyptic number.

It is an amenable number.

211120212212221 is a deficient number, since it is larger than the sum of its proper divisors (16372738262723).

211120212212221 is a wasteful number, since it uses less digits than its factorization.

211120212212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901500.

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

Adding to 211120212212221 its reverse (122212212021112), we get a palindrome (333332424233333).

The spelling of 211120212212221 in words is "two hundred eleven trillion, one hundred twenty billion, two hundred twelve million, two hundred twelve thousand, two hundred twenty-one".