4321011221 has 4 divisors (see below), whose sum is σ = 4325294700. Its totient is φ = 4316727744.

The previous prime is 4321011203. The next prime is 4321011239. The reversal of 4321011221 is 1221101234.

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

It is an interprime number because it is at equal distance from previous prime (4321011203) and next prime (4321011239).

It can be written as a sum of positive squares in 2 ways, for example, as 3037222321 + 1283788900 = 55111^2 + 35830^2 .

It is a cyclic number.

It is not a de Polignac number, because 4321011221 - 2⁶ = 4321011157 is a prime.

It is a super-2 number, since 2×4321011221² = 37342275944015821682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4321011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4321011241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2140226 + ... + 2142243.

It is an arithmetic number, because the mean of its divisors is an integer number (1081323675).

Almost surely, 2^4321011221 is an apocalyptic number.

It is an amenable number.

4321011221 is a deficient number, since it is larger than the sum of its proper divisors (4283479).

4321011221 is a wasteful number, since it uses less digits than its factorization.

4321011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4283478.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 4321011221 is about 65734.3990692849. The cubic root of 4321011221 is about 1628.7776376399. Note that the first 3 decimals are identical.

Adding to 4321011221 its reverse (1221101234), we get a palindrome (5542112455).

The spelling of 4321011221 in words is "four billion, three hundred twenty-one million, eleven thousand, two hundred twenty-one".