4311220221 has 96 divisors (see below), whose sum is σ = 8133285888. Its totient is φ = 2216859840.

The previous prime is 4311220169. The next prime is 4311220231. The reversal of 4311220221 is 1220221134.

It is a happy number.

4311220221 is a `hidden beast` number, since 431 + 12 + 2 + 0 + 221 = 666.

It is not a de Polignac number, because 4311220221 - 2¹³ = 4311212029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4311220194 and 4311220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4311220231) 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 95 ways as a sum of consecutive naturals, for example, 1926115 + ... + 1928351.

It is an arithmetic number, because the mean of its divisors is an integer number (84721728).

Almost surely, 2^4311220221 is an apocalyptic number.

It is an amenable number.

4311220221 is a deficient number, since it is larger than the sum of its proper divisors (3822065667).

4311220221 is a wasteful number, since it uses less digits than its factorization.

4311220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373 (or 2361 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 4311220221 is about 65659.8828890214. The cubic root of 4311220221 is about 1627.5464889352.

Adding to 4311220221 its reverse (1220221134), we get a palindrome (5531441355).

The spelling of 4311220221 in words is "four billion, three hundred eleven million, two hundred twenty thousand, two hundred twenty-one".