2222121200100 has 72 divisors (see below), whose sum is σ = 6448761607008. Its totient is φ = 590775398400.

The previous prime is 2222121200093. The next prime is 2222121200149. The reversal of 2222121200100 is 10021212222.

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 2222121200100.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 11089629 + ... + 11288228.

Almost surely, 2^{2222121200100} is an apocalyptic number.

2222121200100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2222121200100 is an abundant number, since it is smaller than the sum of its proper divisors (4226640406908).

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

2222121200100 is a wasteful number, since it uses less digits than its factorization.

2222121200100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22378205 (or 22378198 counting only the distinct ones).

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

Adding to 2222121200100 its reverse (10021212222), we get a palindrome (2232142412322).

The spelling of 2222121200100 in words is "two trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred thousand, one hundred".