2111223131111 has 4 divisors (see below), whose sum is σ = 2114012065992. Its totient is φ = 2108434196232.

The previous prime is 2111223131077. The next prime is 2111223131113. The reversal of 2111223131111 is 1111313221112.

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 2111223131111 - 2²⁶ = 2111156022247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111223131113) 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, 1394466305 + ... + 1394467818.

It is an arithmetic number, because the mean of its divisors is an integer number (528503016498).

Almost surely, 2^{2111223131111} is an apocalyptic number.

2111223131111 is a deficient number, since it is larger than the sum of its proper divisors (2788934881).

2111223131111 is an equidigital number, since it uses as much as digits as its factorization.

2111223131111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2788934880.

The product of its digits is 72, while the sum is 20.

Adding to 2111223131111 its reverse (1111313221112), we get a palindrome (3222536352223).

Subtracting from 2111223131111 its reverse (1111313221112), we obtain a palindrome (999909909999).

The spelling of 2111223131111 in words is "two trillion, one hundred eleven billion, two hundred twenty-three million, one hundred thirty-one thousand, one hundred eleven".