2111120001220 has 48 divisors (see below), whose sum is σ = 4637095239168. Its totient is φ = 805814190720.

The previous prime is 2111120001163. The next prime is 2111120001227. The reversal of 2111120001220 is 221000211112.

It is a super-2 number, since 2×2111120001220² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2111120001220.

It is not an unprimeable number, because it can be changed into a prime (2111120001227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5256924 + ... + 5644243.

It is an arithmetic number, because the mean of its divisors is an integer number (96606150816).

Almost surely, 2^{2111120001220} is an apocalyptic number.

2111120001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111120001220 is an abundant number, since it is smaller than the sum of its proper divisors (2525975237948).

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

2111120001220 is a wasteful number, since it uses less digits than its factorization.

2111120001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10901620 (or 10901618 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2111120001220 its reverse (221000211112), we get a palindrome (2332120212332).

The spelling of 2111120001220 in words is "two trillion, one hundred eleven billion, one hundred twenty million, one thousand, two hundred twenty".