221000112102221 has 4 divisors (see below), whose sum is σ = 221103238614912. Its totient is φ = 220896985589532.

The previous prime is 221000112102109. The next prime is 221000112102239. The reversal of 221000112102221 is 122201211000122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221000112102221 is a prime.

It is a super-3 number, since 3×221000112102221³ (a number of 44 digits) contains 333 as substring.

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 221000112102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000112102241) 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, 51563253131 + ... + 51563257416.

It is an arithmetic number, because the mean of its divisors is an integer number (55275809653728).

Almost surely, 2^{221000112102221} is an apocalyptic number.

It is an amenable number.

221000112102221 is a deficient number, since it is larger than the sum of its proper divisors (103126512691).

221000112102221 is a wasteful number, since it uses less digits than its factorization.

221000112102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103126512690.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221000112102221 its reverse (122201211000122), we get a palindrome (343201323102343).

The spelling of 221000112102221 in words is "two hundred twenty-one trillion, one hundred twelve million, one hundred two thousand, two hundred twenty-one".