111122121100 has 36 divisors (see below), whose sum is σ = 241181375904. Its totient is φ = 44440300480.

The previous prime is 111122121083. The next prime is 111122121119. The reversal of 111122121100 is 1121221111.

It is a happy 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, 429117 + ... + 637483.

It is an arithmetic number, because the mean of its divisors is an integer number (6699482664).

Almost surely, 2^111122121100 is an apocalyptic number.

111122121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111122121100 is an abundant number, since it is smaller than the sum of its proper divisors (130059254804).

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

111122121100 is a wasteful number, since it uses less digits than its factorization.

111122121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213714 (or 213707 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111122121100 its reverse (1121221111), we get a palindrome (112243342211).

The spelling of 111122121100 in words is "one hundred eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred".