100231221222 has 96 divisors (see below), whose sum is σ = 242525387520. Its totient is φ = 29660040000.

The previous prime is 100231221187. The next prime is 100231221239. The reversal of 100231221222 is 222122132001.

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 = 100231221195 and 100231221204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1735572 + ... + 1792392.

It is an arithmetic number, because the mean of its divisors is an integer number (2526306120).

Almost surely, 2^100231221222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100231221222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121262693760).

100231221222 is an abundant number, since it is smaller than the sum of its proper divisors (142294166298).

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

100231221222 is a wasteful number, since it uses less digits than its factorization.

100231221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57050 (or 57047 counting only the distinct ones).

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

Adding to 100231221222 its reverse (222122132001), we get a palindrome (322353353223).

The spelling of 100231221222 in words is "one hundred billion, two hundred thirty-one million, two hundred twenty-one thousand, two hundred twenty-two".