3231011112221 has 2 divisors, whose sum is σ = 3231011112222. Its totient is φ = 3231011112220.

The previous prime is 3231011112209. The next prime is 3231011112271. The reversal of 3231011112221 is 1222111101323.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2260855060996 + 970156051225 = 1503614^2 + 984965^2 .

It is a cyclic number.

It is not a de Polignac number, because 3231011112221 - 2³⁴ = 3213831243037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3231011112193 and 3231011112202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3231011112271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1615505556110 + 1615505556111.

It is an arithmetic number, because the mean of its divisors is an integer number (1615505556111).

Almost surely, 2^{3231011112221} is an apocalyptic number.

It is an amenable number.

3231011112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3231011112221 is an equidigital number, since it uses as much as digits as its factorization.

3231011112221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 3231011112221 its reverse (1222111101323), we get a palindrome (4453122213544).

The spelling of 3231011112221 in words is "three trillion, two hundred thirty-one billion, eleven million, one hundred twelve thousand, two hundred twenty-one".