211112102221221 has 8 divisors (see below), whose sum is σ = 281522431710720. Its totient is φ = 140721587106272.

The previous prime is 211112102221187. The next prime is 211112102221249. The reversal of 211112102221221 is 122122201211112.

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 211112102221221 - 2²¹ = 211112100124069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211112102221271) 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, 4953568776 + ... + 4953611393.

It is an arithmetic number, because the mean of its divisors is an integer number (35190303963840).

Almost surely, 2^{211112102221221} is an apocalyptic number.

It is an amenable number.

211112102221221 is a deficient number, since it is larger than the sum of its proper divisors (70410329489499).

211112102221221 is an equidigital number, since it uses as much as digits as its factorization.

211112102221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9907187275.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 211112102221221 its reverse (122122201211112), we get a palindrome (333234303432333).

The spelling of 211112102221221 in words is "two hundred eleven trillion, one hundred twelve billion, one hundred two million, two hundred twenty-one thousand, two hundred twenty-one".