2145220011 has 48 divisors (see below), whose sum is σ = 3507624960. Its totient is φ = 1294801200.

The previous prime is 2145220009. The next prime is 2145220019. The reversal of 2145220011 is 1100225412.

2145220011 is a `hidden beast` number, since 2 + 1 + 452 + 200 + 11 = 666.

It is not a de Polignac number, because 2145220011 - 2¹ = 2145220009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2145220019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 884146 + ... + 886568.

It is an arithmetic number, because the mean of its divisors is an integer number (73075520).

Almost surely, 2^2145220011 is an apocalyptic number.

2145220011 is a deficient number, since it is larger than the sum of its proper divisors (1362404949).

2145220011 is a wasteful number, since it uses less digits than its factorization.

2145220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2725 (or 2708 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 2145220011 is about 46316.5198498333. The cubic root of 2145220011 is about 1289.7056819089.

Adding to 2145220011 its reverse (1100225412), we get a palindrome (3245445423).

It can be divided in two parts, 214 and 5220011, that added together give a palindrome (5220225).

The spelling of 2145220011 in words is "two billion, one hundred forty-five million, two hundred twenty thousand, eleven".