2211221212100 has 36 divisors (see below), whose sum is σ = 5006973949824. Its totient is φ = 846032462880.

The previous prime is 2211221212097. The next prime is 2211221212133. The reversal of 2211221212100 is 12121221122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 480697964 + ... + 480702563.

Almost surely, 2^{2211221212100} is an apocalyptic number.

2211221212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211221212100 is an abundant number, since it is smaller than the sum of its proper divisors (2795752737724).

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

2211221212100 is a wasteful number, since it uses less digits than its factorization.

2211221212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961400564 (or 961400557 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2211221212100 its reverse (12121221122), we get a palindrome (2223342433222).

The spelling of 2211221212100 in words is "two trillion, two hundred eleven billion, two hundred twenty-one million, two hundred twelve thousand, one hundred".