111021221022100 has 18 divisors (see below), whose sum is σ = 240916049618174. Its totient is φ = 44408488408800.

The previous prime is 111021221022071. The next prime is 111021221022113. The reversal of 111021221022100 is 1220122120111.

It can be written as a sum of positive squares in 3 ways, for example, as 22903537063696 + 88117683958404 = 4785764^2 + 9387102^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555106105011 + ... + 555106105210.

Almost surely, 2^{111021221022100} is an apocalyptic number.

111021221022100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111021221022100 is an abundant number, since it is smaller than the sum of its proper divisors (129894828596074).

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

111021221022100 is a wasteful number, since it uses less digits than its factorization.

111021221022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110212210235 (or 1110212210228 counting only the distinct ones).

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

Adding to 111021221022100 its reverse (1220122120111), we get a palindrome (112241343142211).

The spelling of 111021221022100 in words is "one hundred eleven trillion, twenty-one billion, two hundred twenty-one million, twenty-two thousand, one hundred".