2111111221211 has 8 divisors (see below), whose sum is σ = 2114784587664. Its totient is φ = 2107439642880.

The previous prime is 2111111221129. The next prime is 2111111221217. The reversal of 2111111221211 is 1121221111112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111111221211 - 2¹⁰ = 2111111220187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2111111221211.

It is not an unprimeable number, because it can be changed into a prime (2111111221217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1927235 + ... + 2817171.

It is an arithmetic number, because the mean of its divisors is an integer number (264348073458).

Almost surely, 2^{2111111221211} is an apocalyptic number.

2111111221211 is a deficient number, since it is larger than the sum of its proper divisors (3673366453).

2111111221211 is an equidigital number, since it uses as much as digits as its factorization.

2111111221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894061.

The product of its digits is 16, while the sum is 17.

Adding to 2111111221211 its reverse (1121221111112), we get a palindrome (3232332332323).

The spelling of 2111111221211 in words is "two trillion, one hundred eleven billion, one hundred eleven million, two hundred twenty-one thousand, two hundred eleven".