3221011231 has 2 divisors, whose sum is σ = 3221011232. Its totient is φ = 3221011230.

The previous prime is 3221011229. The next prime is 3221011253. The reversal of 3221011231 is 1321101223.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3221011231 - 2¹ = 3221011229 is a prime.

It is a super-2 number, since 2×3221011231² = 20749826700456270722, which contains 22 as substring.

Together with 3221011229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3221011531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610505615 + 1610505616.

It is an arithmetic number, because the mean of its divisors is an integer number (1610505616).

Almost surely, 2^3221011231 is an apocalyptic number.

3221011231 is a deficient number, since it is larger than the sum of its proper divisors (1).

3221011231 is an equidigital number, since it uses as much as digits as its factorization.

3221011231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 3221011231 is about 56753.9534393861. The cubic root of 3221011231 is about 1476.8308176173.

Adding to 3221011231 its reverse (1321101223), we get a palindrome (4542112454).

The spelling of 3221011231 in words is "three billion, two hundred twenty-one million, eleven thousand, two hundred thirty-one".