3123233221 has 2 divisors, whose sum is σ = 3123233222. Its totient is φ = 3123233220.

The previous prime is 3123233219. The next prime is 3123233249. The reversal of 3123233221 is 1223323213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2511412996 + 611820225 = 50114^2 + 24735^2 .

It is a cyclic number.

It is not a de Polignac number, because 3123233221 - 2¹ = 3123233219 is a prime.

Together with 3123233219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3123233192 and 3123233201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3123233021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1561616610 + 1561616611.

It is an arithmetic number, because the mean of its divisors is an integer number (1561616611).

Almost surely, 2^3123233221 is an apocalyptic number.

It is an amenable number.

3123233221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3123233221 is an equidigital number, since it uses as much as digits as its factorization.

3123233221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 22.

The square root of 3123233221 is about 55885.8946515129. The cubic root of 3123233221 is about 1461.7332921984.

Adding to 3123233221 its reverse (1223323213), we get a palindrome (4346556434).

The spelling of 3123233221 in words is "three billion, one hundred twenty-three million, two hundred thirty-three thousand, two hundred twenty-one".