2212221102100 has 18 divisors (see below), whose sum is σ = 4800519791774. Its totient is φ = 884888440800.

The previous prime is 2212221102067. The next prime is 2212221102109. The reversal of 2212221102100 is 12011222122.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 6158482576 + 2206062619524 = 78476^2 + 1485282^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212221102109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11061105411 + ... + 11061105610.

Almost surely, 2^{2212221102100} is an apocalyptic number.

2212221102100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2212221102100 is an abundant number, since it is smaller than the sum of its proper divisors (2588298689674).

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

2212221102100 is a wasteful number, since it uses less digits than its factorization.

2212221102100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22122211035 (or 22122211028 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2212221102100 its reverse (12011222122), we get a palindrome (2224232324222).

The spelling of 2212221102100 in words is "two trillion, two hundred twelve billion, two hundred twenty-one million, one hundred two thousand, one hundred".