2113131111 has 16 divisors (see below), whose sum is σ = 3467702784. Its totient is φ = 1114618464.

The previous prime is 2113131109. The next prime is 2113131121. The reversal of 2113131111 is 1111313112.

It is not a de Polignac number, because 2113131111 - 2¹ = 2113131109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113131121) 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, 3869931 + ... + 3870476.

It is an arithmetic number, because the mean of its divisors is an integer number (216731424).

Almost surely, 2^2113131111 is an apocalyptic number.

2113131111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2113131111 is a deficient number, since it is larger than the sum of its proper divisors (1354571673).

2113131111 is a wasteful number, since it uses less digits than its factorization.

2113131111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7740430.

The product of its digits is 18, while the sum is 15.

The square root of 2113131111 is about 45968.8058470089. The cubic root of 2113131111 is about 1283.2427364091.

Adding to 2113131111 its reverse (1111313112), we get a palindrome (3224444223).

It can be divided in two parts, 211313111 and 1, that added together give a palindrome (211313112).

The spelling of 2113131111 in words is "two billion, one hundred thirteen million, one hundred thirty-one thousand, one hundred eleven".