221022122221 has 8 divisors (see below), whose sum is σ = 221507985600. Its totient is φ = 220536649632.

The previous prime is 221022122207. The next prime is 221022122231. The reversal of 221022122221 is 122221220122.

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 221022122221 - 2²⁷ = 220887904493 is a prime.

It is a super-2 number, since 2×221022122221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022122231) 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, 1049446 + ... + 1242328.

It is an arithmetic number, because the mean of its divisors is an integer number (27688498200).

Almost surely, 2^221022122221 is an apocalyptic number.

It is an amenable number.

221022122221 is a deficient number, since it is larger than the sum of its proper divisors (485863379).

221022122221 is a wasteful number, since it uses less digits than its factorization.

221022122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195395.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221022122221 its reverse (122221220122), we get a palindrome (343243342343).

The spelling of 221022122221 in words is "two hundred twenty-one billion, twenty-two million, one hundred twenty-two thousand, two hundred twenty-one".