111212120220100 has 72 divisors (see below), whose sum is σ = 244745313297408. Its totient is φ = 43858840243200.

The previous prime is 111212120220079. The next prime is 111212120220107. The reversal of 111212120220100 is 1022021212111.

It is not an unprimeable number, because it can be changed into a prime (111212120220107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19245796 + ... + 24347995.

It is an arithmetic number, because the mean of its divisors is an integer number (3399240462464).

Almost surely, 2^{111212120220100} is an apocalyptic number.

111212120220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212120220100 is an abundant number, since it is smaller than the sum of its proper divisors (133533193077308).

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

111212120220100 is a wasteful number, since it uses less digits than its factorization.

111212120220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43594165 (or 43594158 counting only the distinct ones).

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

Adding to 111212120220100 its reverse (1022021212111), we get a palindrome (112234141432211).

The spelling of 111212120220100 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred twenty million, two hundred twenty thousand, one hundred".