221221201022 has 8 divisors (see below), whose sum is σ = 332117129016. Its totient is φ = 110515491352.

The previous prime is 221221200997. The next prime is 221221201039. The reversal of 221221201022 is 220102122122.

It is a happy number.

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

It is a super-2 number, since 2×221221201022² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47551673 + ... + 47556324.

It is an arithmetic number, because the mean of its divisors is an integer number (41514641127).

Almost surely, 2^221221201022 is an apocalyptic number.

221221201022 is a deficient number, since it is larger than the sum of its proper divisors (110895927994).

221221201022 is a wasteful number, since it uses less digits than its factorization.

221221201022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95109162.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221221201022 its reverse (220102122122), we get a palindrome (441323323144).

The spelling of 221221201022 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred one thousand, twenty-two".