210212221111 has 8 divisors (see below), whose sum is σ = 210481180848. Its totient is φ = 209943360000.

The previous prime is 210212221081. The next prime is 210212221117. The reversal of 210212221111 is 111122212012.

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 210212221111 - 2⁷ = 210212220983 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 (210212221117) 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, 4844311 + ... + 4887511.

It is an arithmetic number, because the mean of its divisors is an integer number (26310147606).

Almost surely, 2^210212221111 is an apocalyptic number.

210212221111 is a deficient number, since it is larger than the sum of its proper divisors (268959737).

210212221111 is an equidigital number, since it uses as much as digits as its factorization.

210212221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49313.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210212221111 its reverse (111122212012), we get a palindrome (321334433123).

Subtracting from 210212221111 its reverse (111122212012), we obtain a palindrome (99090009099).

The spelling of 210212221111 in words is "two hundred ten billion, two hundred twelve million, two hundred twenty-one thousand, one hundred eleven".