221103214221 has 32 divisors (see below), whose sum is σ = 308821413888. Its totient is φ = 140444205440.

The previous prime is 221103214183. The next prime is 221103214289. The reversal of 221103214221 is 122412301122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221103214221 - 2²³ = 221094825613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221103214421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44782465 + ... + 44787401.

It is an arithmetic number, because the mean of its divisors is an integer number (9650669184).

Almost surely, 2^221103214221 is an apocalyptic number.

It is an amenable number.

221103214221 is a deficient number, since it is larger than the sum of its proper divisors (87718199667).

221103214221 is a wasteful number, since it uses less digits than its factorization.

221103214221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7361.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 221103214221 its reverse (122412301122), we get a palindrome (343515515343).

The spelling of 221103214221 in words is "two hundred twenty-one billion, one hundred three million, two hundred fourteen thousand, two hundred twenty-one".