100221222220 has 24 divisors (see below), whose sum is σ = 240530933664. Its totient is φ = 34361561856.

The previous prime is 100221222203. The next prime is 100221222247. The reversal of 100221222220 is 22222122001.

It is a junction number, because it is equal to n+sod(n) for n = 100221222194 and 100221222203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357932797 + ... + 357933076.

It is an arithmetic number, because the mean of its divisors is an integer number (10022122236).

Almost surely, 2^100221222220 is an apocalyptic number.

100221222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100221222220 is an abundant number, since it is smaller than the sum of its proper divisors (140309711444).

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

100221222220 is a wasteful number, since it uses less digits than its factorization.

100221222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715865889 (or 715865887 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 100221222220 its reverse (22222122001), we get a palindrome (122443344221).

The spelling of 100221222220 in words is "one hundred billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty".