222111102012100 has 54 divisors (see below), whose sum is σ = 560671881805770. Its totient is φ = 76152377831040.

The previous prime is 222111102012083. The next prime is 222111102012127. The reversal of 222111102012100 is 1210201111222.

It can be written as a sum of positive squares in 3 ways, for example, as 56862699421696 + 165248402590404 = 7540736^2 + 12854898^2 .

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 17 ways as a sum of consecutive naturals, for example, 22664393265 + ... + 22664403064.

Almost surely, 2^{222111102012100} is an apocalyptic number.

222111102012100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222111102012100 is an abundant number, since it is smaller than the sum of its proper divisors (338560779793670).

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

222111102012100 is a wasteful number, since it uses less digits than its factorization.

222111102012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45328796357 (or 45328796343 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 222111102012100 its reverse (1210201111222), we get a palindrome (223321303123322).

The spelling of 222111102012100 in words is "two hundred twenty-two trillion, one hundred eleven billion, one hundred two million, twelve thousand, one hundred".