221010202012111 has 4 divisors (see below), whose sum is σ = 221032456598824. Its totient is φ = 220987947425400.

The previous prime is 221010202012021. The next prime is 221010202012181. The reversal of 221010202012111 is 111210202010122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221010202012111 is a prime.

It is a super-2 number, since 2×221010202012111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221010202012181) 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 3 ways as a sum of consecutive naturals, for example, 11127278460 + ... + 11127298321.

It is an arithmetic number, because the mean of its divisors is an integer number (55258114149706).

Almost surely, 2^{221010202012111} is an apocalyptic number.

221010202012111 is a deficient number, since it is larger than the sum of its proper divisors (22254586713).

221010202012111 is an equidigital number, since it uses as much as digits as its factorization.

221010202012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22254586712.

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

Adding to 221010202012111 its reverse (111210202010122), we get a palindrome (332220404022233).

The spelling of 221010202012111 in words is "two hundred twenty-one trillion, ten billion, two hundred two million, twelve thousand, one hundred eleven".