2145312111 has 32 divisors (see below), whose sum is σ = 2975113152. Its totient is φ = 1374197760.

The previous prime is 2145312109. The next prime is 2145312121. The reversal of 2145312111 is 1112135412.

It is not a de Polignac number, because 2145312111 - 2¹ = 2145312109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145312121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3617431 + ... + 3618023.

It is an arithmetic number, because the mean of its divisors is an integer number (92972286).

Almost surely, 2^2145312111 is an apocalyptic number.

2145312111 is a deficient number, since it is larger than the sum of its proper divisors (829801041).

2145312111 is a wasteful number, since it uses less digits than its factorization.

2145312111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083.

The product of its digits is 240, while the sum is 21.

The square root of 2145312111 is about 46317.5140848470. The cubic root of 2145312111 is about 1289.7241384764.

Adding to 2145312111 its reverse (1112135412), we get a palindrome (3257447523).

The spelling of 2145312111 in words is "two billion, one hundred forty-five million, three hundred twelve thousand, one hundred eleven".