3211221231 has 48 divisors (see below), whose sum is σ = 4888228800. Its totient is φ = 2029224960.

The previous prime is 3211221203. The next prime is 3211221241. The reversal of 3211221231 is 1321221123.

3211221231 is a `hidden beast` number, since 3 + 211 + 221 + 231 = 666.

It is not a de Polignac number, because 3211221231 - 2¹¹ = 3211219183 is a prime.

It is a super-2 number, since 2×3211221231² = 20623883588850310722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3211221241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2294670 + ... + 2296068.

It is an arithmetic number, because the mean of its divisors is an integer number (101838100).

Almost surely, 2^3211221231 is an apocalyptic number.

3211221231 is a deficient number, since it is larger than the sum of its proper divisors (1677007569).

3211221231 is a wasteful number, since it uses less digits than its factorization.

3211221231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616 (or 1613 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 3211221231 is about 56667.6383044150. The cubic root of 3211221231 is about 1475.3330636930. Note that the first 3 decimals are identical.

Adding to 3211221231 its reverse (1321221123), we get a palindrome (4532442354).

The spelling of 3211221231 in words is "three billion, two hundred eleven million, two hundred twenty-one thousand, two hundred thirty-one".