4031220321 has 12 divisors (see below), whose sum is σ = 5904887040. Its totient is φ = 2649627960.

The previous prime is 4031220299. The next prime is 4031220341. The reversal of 4031220321 is 1230221304.

It is not a de Polignac number, because 4031220321 - 2⁶ = 4031220257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4031220294 and 4031220303.

It is not an unprimeable number, because it can be changed into a prime (4031220341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3153681 + ... + 3154958.

It is an arithmetic number, because the mean of its divisors is an integer number (492073920).

Almost surely, 2^4031220321 is an apocalyptic number.

It is an amenable number.

4031220321 is a deficient number, since it is larger than the sum of its proper divisors (1873666719).

4031220321 is a wasteful number, since it uses less digits than its factorization.

4031220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6308716 (or 6308713 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 4031220321 is about 63491.8917736745. The cubic root of 4031220321 is about 1591.5202843709.

Adding to 4031220321 its reverse (1230221304), we get a palindrome (5261441625).

The spelling of 4031220321 in words is "four billion, thirty-one million, two hundred twenty thousand, three hundred twenty-one".