2110310021 has 2 divisors, whose sum is σ = 2110310022. Its totient is φ = 2110310020.

The previous prime is 2110310017. The next prime is 2110310023. The reversal of 2110310021 is 1200130112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2094069121 + 16240900 = 45761^2 + 4030^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110310021 - 2² = 2110310017 is a prime.

Together with 2110310023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2110309984 and 2110310011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2110310023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055155010 + 1055155011.

It is an arithmetic number, because the mean of its divisors is an integer number (1055155011).

Almost surely, 2^2110310021 is an apocalyptic number.

It is an amenable number.

2110310021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2110310021 is an equidigital number, since it uses as much as digits as its factorization.

2110310021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2110310021 is about 45938.1107687288. The cubic root of 2110310021 is about 1282.6714269391.

Adding to 2110310021 its reverse (1200130112), we get a palindrome (3310440133).

The spelling of 2110310021 in words is "two billion, one hundred ten million, three hundred ten thousand, twenty-one".