2221123445 has 4 divisors (see below), whose sum is σ = 2665348140. Its totient is φ = 1776898752.

The previous prime is 2221123403. The next prime is 2221123453. The reversal of 2221123445 is 5443211222.

2221123445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 704955601 + 1516167844 = 26551^2 + 38938^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221123445 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222112340 + ... + 222112349.

It is an arithmetic number, because the mean of its divisors is an integer number (666337035).

Almost surely, 2^2221123445 is an apocalyptic number.

It is an amenable number.

2221123445 is a deficient number, since it is larger than the sum of its proper divisors (444224695).

2221123445 is an equidigital number, since it uses as much as digits as its factorization.

2221123445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444224694.

The product of its digits is 3840, while the sum is 26.

The square root of 2221123445 is about 47128.7963457587. The cubic root of 2221123445 is about 1304.7407665618.

Adding to 2221123445 its reverse (5443211222), we get a palindrome (7664334667).

The spelling of 2221123445 in words is "two billion, two hundred twenty-one million, one hundred twenty-three thousand, four hundred forty-five".