222122210100 has 72 divisors (see below), whose sum is σ = 734484115008. Its totient is φ = 50770790400.

The previous prime is 222122210077. The next prime is 222122210117. The reversal of 222122210100 is 1012221222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 222122210100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52884141 + ... + 52888340.

It is an arithmetic number, because the mean of its divisors is an integer number (10201168264).

Almost surely, 2^222122210100 is an apocalyptic number.

222122210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222122210100 is an abundant number, since it is smaller than the sum of its proper divisors (512361904908).

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

222122210100 is a wasteful number, since it uses less digits than its factorization.

222122210100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105772505 (or 105772498 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 222122210100 its reverse (1012221222), we get a palindrome (223134431322).

It can be divided in two parts, 2221222 and 10100, that added together give a palindrome (2231322).

The spelling of 222122210100 in words is "two hundred twenty-two billion, one hundred twenty-two million, two hundred ten thousand, one hundred".