221002100101221 has 8 divisors (see below), whose sum is σ = 299500113798624. Its totient is φ = 144919409902320.

The previous prime is 221002100101177. The next prime is 221002100101231. The reversal of 221002100101221 is 122101001200122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221002100101221 - 2¹⁸ = 221002099839077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221002100101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002100101231) 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, 603830874411 + ... + 603830874776.

It is an arithmetic number, because the mean of its divisors is an integer number (37437514224828).

Almost surely, 2^{221002100101221} is an apocalyptic number.

It is an amenable number.

221002100101221 is a deficient number, since it is larger than the sum of its proper divisors (78498013697403).

221002100101221 is a wasteful number, since it uses less digits than its factorization.

221002100101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207661749251.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221002100101221 its reverse (122101001200122), we get a palindrome (343103101301343).

The spelling of 221002100101221 in words is "two hundred twenty-one trillion, two billion, one hundred million, one hundred one thousand, two hundred twenty-one".