100221231222 has 24 divisors (see below), whose sum is σ = 248166858576. Its totient is φ = 28634637456.

The previous prime is 100221231221. The next prime is 100221231241. The reversal of 100221231222 is 222132122001.

It is a super-2 number, since 2×100221231222² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 100221231195 and 100221231204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100221231221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 397703173 + ... + 397703424.

It is an arithmetic number, because the mean of its divisors is an integer number (10340285774).

Almost surely, 2^100221231222 is an apocalyptic number.

100221231222 is an abundant number, since it is smaller than the sum of its proper divisors (147945627354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100221231222 is a wasteful number, since it uses less digits than its factorization.

100221231222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795406612 (or 795406609 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 100221231222 its reverse (222132122001), we get a palindrome (322353353223).

The spelling of 100221231222 in words is "one hundred billion, two hundred twenty-one million, two hundred thirty-one thousand, two hundred twenty-two".