221221110022 has 32 divisors (see below), whose sum is σ = 367800009984. Its totient is φ = 98948858400.

The previous prime is 221221109987. The next prime is 221221110043. The reversal of 221221110022 is 220011122122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221221109978 and 221221110005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 681528 + ... + 952324.

It is an arithmetic number, because the mean of its divisors is an integer number (11493750312).

Almost surely, 2^221221110022 is an apocalyptic number.

221221110022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221221110022 is a deficient number, since it is larger than the sum of its proper divisors (146578899962).

221221110022 is a wasteful number, since it uses less digits than its factorization.

221221110022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271404.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221221110022 its reverse (220011122122), we get a palindrome (441232232144).

The spelling of 221221110022 in words is "two hundred twenty-one billion, two hundred twenty-one million, one hundred ten thousand, twenty-two".