2111221221011 has 32 divisors (see below), whose sum is σ = 2670467174400. Its totient is φ = 1628123172480.

The previous prime is 2111221220957. The next prime is 2111221221041. The reversal of 2111221221011 is 1101221221112.

It is not a de Polignac number, because 2111221221011 - 2¹⁸ = 2111220958867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2111221221041) 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 31 ways as a sum of consecutive naturals, for example, 4251395 + ... + 4721948.

It is an arithmetic number, because the mean of its divisors is an integer number (83452099200).

Almost surely, 2^{2111221221011} is an apocalyptic number.

2111221221011 is a deficient number, since it is larger than the sum of its proper divisors (559245953389).

2111221221011 is a wasteful number, since it uses less digits than its factorization.

2111221221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8973459.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2111221221011 its reverse (1101221221112), we get a palindrome (3212442442123).

The spelling of 2111221221011 in words is "two trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twenty-one thousand, eleven".