2221128734 has 32 divisors (see below), whose sum is σ = 3881226240. Its totient is φ = 943336800.

The previous prime is 2221128719. The next prime is 2221128739. The reversal of 2221128734 is 4378211222.

It is a self number, because there is not a number n which added to its sum of digits gives 2221128734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221128739) 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, 36374 + ... + 75929.

It is an arithmetic number, because the mean of its divisors is an integer number (121288320).

Almost surely, 2^2221128734 is an apocalyptic number.

2221128734 is a deficient number, since it is larger than the sum of its proper divisors (1660097506).

2221128734 is a wasteful number, since it uses less digits than its factorization.

2221128734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112376.

The product of its digits is 10752, while the sum is 32.

The square root of 2221128734 is about 47128.8524579158. The cubic root of 2221128734 is about 1304.7418021891.

Adding to 2221128734 its reverse (4378211222), we get a palindrome (6599339956).

The spelling of 2221128734 in words is "two billion, two hundred twenty-one million, one hundred twenty-eight thousand, seven hundred thirty-four".