2211212120111 has 16 divisors (see below), whose sum is σ = 2521823040000. Its totient is φ = 1925755751808.

The previous prime is 2211212120101. The next prime is 2211212120207. The reversal of 2211212120111 is 1110212121122.

It is a cyclic number.

It is not a de Polignac number, because 2211212120111 - 2³⁸ = 1936334213167 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 2211212120111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211212120101) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 79589111 + ... + 79616888.

It is an arithmetic number, because the mean of its divisors is an integer number (157613940000).

Almost surely, 2^{2211212120111} is an apocalyptic number.

2211212120111 is a deficient number, since it is larger than the sum of its proper divisors (310610919889).

2211212120111 is a wasteful number, since it uses less digits than its factorization.

2211212120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159206078.

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

Adding to 2211212120111 its reverse (1110212121122), we get a palindrome (3321424241233).

The spelling of 2211212120111 in words is "two trillion, two hundred eleven billion, two hundred twelve million, one hundred twenty thousand, one hundred eleven".