2102222111111 has 4 divisors (see below), whose sum is σ = 2225882235312. Its totient is φ = 1978561986912.

The previous prime is 2102222111089. The next prime is 2102222111123. The reversal of 2102222111111 is 1111112222012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2102222111111 - 2¹⁸ = 2102221848967 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 123660124183 = 2102222111111 / (2 + 1 + 0 + 2 + 2 + 2 + 2 + 1 + 1 + 1 + 1 + 1 + 1).

It is a self number, because there is not a number n which added to its sum of digits gives 2102222111111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102222111131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61830062075 + ... + 61830062108.

It is an arithmetic number, because the mean of its divisors is an integer number (556470558828).

Almost surely, 2^{2102222111111} is an apocalyptic number.

2102222111111 is a deficient number, since it is larger than the sum of its proper divisors (123660124201).

2102222111111 is a wasteful number, since it uses less digits than its factorization.

2102222111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123660124200.

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

Adding to 2102222111111 its reverse (1111112222012), we get a palindrome (3213334333123).

The spelling of 2102222111111 in words is "two trillion, one hundred two billion, two hundred twenty-two million, one hundred eleven thousand, one hundred eleven".