2111131021111 has 16 divisors (see below), whose sum is σ = 2490601553920. Its totient is φ = 1751132960640.

The previous prime is 2111131020961. The next prime is 2111131021123. The reversal of 2111131021111 is 1111201311112.

It is not a de Polignac number, because 2111131021111 - 2⁹ = 2111131020599 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 (2111131024111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19660255 + ... + 19767343.

It is an arithmetic number, because the mean of its divisors is an integer number (155662597120).

Almost surely, 2^{2111131021111} is an apocalyptic number.

2111131021111 is a deficient number, since it is larger than the sum of its proper divisors (379470532809).

2111131021111 is a wasteful number, since it uses less digits than its factorization.

2111131021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197974.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 2111131021111 its reverse (1111201311112), we get a palindrome (3222332332223).

The spelling of 2111131021111 in words is "two trillion, one hundred eleven billion, one hundred thirty-one million, twenty-one thousand, one hundred eleven".