221002120112111 has 4 divisors (see below), whose sum is σ = 238002283197672. Its totient is φ = 204001957026552.

The previous prime is 221002120112083. The next prime is 221002120112119. The reversal of 221002120112111 is 111211021200122.

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

It is a cyclic number.

It is not a de Polignac number, because 221002120112111 - 2²⁶ = 221002053003247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221002120112111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002120112119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8500081542761 + ... + 8500081542786.

It is an arithmetic number, because the mean of its divisors is an integer number (59500570799418).

Almost surely, 2^{221002120112111} is an apocalyptic number.

221002120112111 is a deficient number, since it is larger than the sum of its proper divisors (17000163085561).

221002120112111 is a wasteful number, since it uses less digits than its factorization.

221002120112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17000163085560.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221002120112111 its reverse (111211021200122), we get a palindrome (332213141312233).

The spelling of 221002120112111 in words is "two hundred twenty-one trillion, two billion, one hundred twenty million, one hundred twelve thousand, one hundred eleven".