12111221110020 has 24 divisors (see below), whose sum is σ = 33911419108224. Its totient is φ = 3229658962656.

The previous prime is 12111221109983. The next prime is 12111221110039. The reversal of 12111221110020 is 2001112211121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100926842524 + ... + 100926842643.

It is an arithmetic number, because the mean of its divisors is an integer number (1412975796176).

Almost surely, 2^{12111221110020} is an apocalyptic number.

12111221110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111221110020 is an abundant number, since it is smaller than the sum of its proper divisors (21800197998204).

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

12111221110020 is a wasteful number, since it uses less digits than its factorization.

12111221110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201853685179 (or 201853685177 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12111221110020 its reverse (2001112211121), we get a palindrome (14112333321141).

The spelling of 12111221110020 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-one million, one hundred ten thousand, twenty".