3231221131 has 2 divisors, whose sum is σ = 3231221132. Its totient is φ = 3231221130.

The previous prime is 3231221113. The next prime is 3231221143. The reversal of 3231221131 is 1311221323.

Together with previous prime (3231221113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (1311221323) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3231221131 - 2²³ = 3222832523 is a prime.

It is a super-2 number, since 2×3231221131² = 20881579994841838322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3231221099 and 3231221108.

It is not a weakly prime, because it can be changed into another prime (3231221531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1615610565 + 1615610566.

It is an arithmetic number, because the mean of its divisors is an integer number (1615610566).

Almost surely, 2^3231221131 is an apocalyptic number.

3231221131 is a deficient number, since it is larger than the sum of its proper divisors (1).

3231221131 is an equidigital number, since it uses as much as digits as its factorization.

3231221131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 3231221131 is about 56843.8310725095. The cubic root of 3231221131 is about 1478.3895818532.

Adding to 3231221131 its reverse (1311221323), we get a palindrome (4542442454).

The spelling of 3231221131 in words is "three billion, two hundred thirty-one million, two hundred twenty-one thousand, one hundred thirty-one".