2311021 has 2 divisors, whose sum is σ = 2311022. Its totient is φ = 2311020.

The previous prime is 2311013. The next prime is 2311051. The reversal of 2311021 is 1201132.

2311021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1473796 + 837225 = 1214^2 + 915^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311021 - 2³ = 2311013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2310989 and 2311007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2311051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155510 + 1155511.

It is an arithmetic number, because the mean of its divisors is an integer number (1155511).

2^2311021 is an apocalyptic number.

It is an amenable number.

2311021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311021 is an equidigital number, since it uses as much as digits as its factorization.

2311021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2311021 is about 1520.2042625911. The cubic root of 2311021 is about 132.2111138133.

Adding to 2311021 its reverse (1201132), we get a palindrome (3512153).

The spelling of 2311021 in words is "two million, three hundred eleven thousand, twenty-one".