2145221113 has 16 divisors (see below), whose sum is σ = 2542904064. Its totient is φ = 1771329600.

The previous prime is 2145221083. The next prime is 2145221119. The reversal of 2145221113 is 3111225412.

It is a cyclic number.

It is not a de Polignac number, because 2145221113 - 2⁵ = 2145221081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145221119) 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, 14845 + ... + 67162.

It is an arithmetic number, because the mean of its divisors is an integer number (158931504).

Almost surely, 2^2145221113 is an apocalyptic number.

It is an amenable number.

2145221113 is a deficient number, since it is larger than the sum of its proper divisors (397682951).

2145221113 is a wasteful number, since it uses less digits than its factorization.

2145221113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82152.

The product of its digits is 480, while the sum is 22.

The square root of 2145221113 is about 46316.5317462351. The cubic root of 2145221113 is about 1289.7059027496.

Adding to 2145221113 its reverse (3111225412), we get a palindrome (5256446525).

The spelling of 2145221113 in words is "two billion, one hundred forty-five million, two hundred twenty-one thousand, one hundred thirteen".