2321111021 has 2 divisors, whose sum is σ = 2321111022. Its totient is φ = 2321111020.

The previous prime is 2321110999. The next prime is 2321111029. The reversal of 2321111021 is 1201111232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1740975625 + 580135396 = 41725^2 + 24086^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321111021 - 2¹⁴ = 2321094637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2321110987 and 2321111005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2321111029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160555510 + 1160555511.

It is an arithmetic number, because the mean of its divisors is an integer number (1160555511).

Almost surely, 2^2321111021 is an apocalyptic number.

It is an amenable number.

2321111021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321111021 is an equidigital number, since it uses as much as digits as its factorization.

2321111021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 2321111021 is about 48177.9100937349. The cubic root of 2321111021 is about 1324.0324767349.

Adding to 2321111021 its reverse (1201111232), we get a palindrome (3522222253).

The spelling of 2321111021 in words is "two billion, three hundred twenty-one million, one hundred eleven thousand, twenty-one".