111222100002100 has 36 divisors (see below), whose sum is σ = 243487815055884. Its totient is φ = 44095133447680.

The previous prime is 111222100002089. The next prime is 111222100002131. The reversal of 111222100002100 is 1200001222111.

It can be written as a sum of positive squares in 6 ways, for example, as 11962564185636 + 99259535816464 = 3458694^2 + 9962908^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4921320559 + ... + 4921343158.

It is an arithmetic number, because the mean of its divisors is an integer number (6763550418219).

Almost surely, 2^{111222100002100} is an apocalyptic number.

111222100002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111222100002100 is an abundant number, since it is smaller than the sum of its proper divisors (132265715053784).

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

111222100002100 is a wasteful number, since it uses less digits than its factorization.

111222100002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9842663844 (or 9842663837 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111222100002100 its reverse (1200001222111), we get a palindrome (112422101224211).

The spelling of 111222100002100 in words is "one hundred eleven trillion, two hundred twenty-two billion, one hundred million, two thousand, one hundred".