2111220411555 has 16 divisors (see below), whose sum is σ = 3378078365184. Its totient is φ = 1125942317280.

The previous prime is 2111220411527. The next prime is 2111220411569. The reversal of 2111220411555 is 5551140221112.

It is not a de Polignac number, because 2111220411555 - 2¹⁰ = 2111220410531 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2200219 + ... + 3010548.

It is an arithmetic number, because the mean of its divisors is an integer number (211129897824).

Almost surely, 2^{2111220411555} is an apocalyptic number.

2111220411555 is a deficient number, since it is larger than the sum of its proper divisors (1266857953629).

2111220411555 is a wasteful number, since it uses less digits than its factorization.

2111220411555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5237786.

The product of its (nonzero) digits is 4000, while the sum is 30.

Adding to 2111220411555 its reverse (5551140221112), we get a palindrome (7662360632667).

The spelling of 2111220411555 in words is "two trillion, one hundred eleven billion, two hundred twenty million, four hundred eleven thousand, five hundred fifty-five".