111220121002100 has 72 divisors (see below), whose sum is σ = 269710026578496. Its totient is φ = 39457249120000.

The previous prime is 111220121002093. The next prime is 111220121002183. The reversal of 111220121002100 is 1200121022111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1232993936 + ... + 1233084135.

It is an arithmetic number, because the mean of its divisors is an integer number (3745972591368).

Almost surely, 2^{111220121002100} is an apocalyptic number.

111220121002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111220121002100 is an abundant number, since it is smaller than the sum of its proper divisors (158489905576396).

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

111220121002100 is a wasteful number, since it uses less digits than its factorization.

111220121002100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2466078137 (or 2466078130 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111220121002100 its reverse (1200121022111), we get a palindrome (112420242024211).

The spelling of 111220121002100 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred twenty-one million, two thousand, one hundred".