201111011210221 has 32 divisors (see below), whose sum is σ = 235038228480000. Its totient is φ = 172008687329136.

The previous prime is 201111011210171. The next prime is 201111011210279. The reversal of 201111011210221 is 122012110111102.

It is not a de Polignac number, because 201111011210221 - 2²⁵ = 201110977655789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201111011210195 and 201111011210204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111011210321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2869740660 + ... + 2869810738.

It is an arithmetic number, because the mean of its divisors is an integer number (7344944640000).

Almost surely, 2^{201111011210221} is an apocalyptic number.

It is an amenable number.

201111011210221 is a deficient number, since it is larger than the sum of its proper divisors (33927217269779).

201111011210221 is an equidigital number, since it uses as much as digits as its factorization.

201111011210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88046 (or 88032 counting only the distinct ones).

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

Adding to 201111011210221 its reverse (122012110111102), we get a palindrome (323123121321323).

The spelling of 201111011210221 in words is "two hundred one trillion, one hundred eleven billion, eleven million, two hundred ten thousand, two hundred twenty-one".