221002217221 has 8 divisors (see below), whose sum is σ = 231657459264. Its totient is φ = 210597686880.

The previous prime is 221002217213. The next prime is 221002217239. The reversal of 221002217221 is 122712200122.

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

It is a cyclic number.

It is not a de Polignac number, because 221002217221 - 2³ = 221002217213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221002217192 and 221002217201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002217201) 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, 62676121 + ... + 62679646.

It is an arithmetic number, because the mean of its divisors is an integer number (28957182408).

Almost surely, 2^221002217221 is an apocalyptic number.

It is an amenable number.

221002217221 is a deficient number, since it is larger than the sum of its proper divisors (10655242043).

221002217221 is a wasteful number, since it uses less digits than its factorization.

221002217221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125355851.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 221002217221 its reverse (122712200122), we get a palindrome (343714417343).

The spelling of 221002217221 in words is "two hundred twenty-one billion, two million, two hundred seventeen thousand, two hundred twenty-one".