221323112221 has 8 divisors (see below), whose sum is σ = 222528994688. Its totient is φ = 220120092000.

The previous prime is 221323112177. The next prime is 221323112233. The reversal of 221323112221 is 122211323122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221323112221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221323112192 and 221323112201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221323116221) 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, 560400 + ... + 869881.

It is an arithmetic number, because the mean of its divisors is an integer number (27816124336).

Almost surely, 2^221323112221 is an apocalyptic number.

It is an amenable number.

221323112221 is a deficient number, since it is larger than the sum of its proper divisors (1205882467).

221323112221 is a wasteful number, since it uses less digits than its factorization.

221323112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431123.

The product of its digits is 576, while the sum is 22.

Adding to 221323112221 its reverse (122211323122), we get a palindrome (343534435343).

The spelling of 221323112221 in words is "two hundred twenty-one billion, three hundred twenty-three million, one hundred twelve thousand, two hundred twenty-one".