4851001021 has 2 divisors, whose sum is σ = 4851001022. Its totient is φ = 4851001020.

The previous prime is 4851001019. The next prime is 4851001049. The reversal of 4851001021 is 1201001584.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4410420921 + 440580100 = 66411^2 + 20990^2 .

It is a cyclic number.

It is not a de Polignac number, because 4851001021 - 2¹ = 4851001019 is a prime.

Together with 4851001019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 4851000983 and 4851001001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4851001061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2425500510 + 2425500511.

It is an arithmetic number, because the mean of its divisors is an integer number (2425500511).

Almost surely, 2^4851001021 is an apocalyptic number.

It is an amenable number.

4851001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4851001021 is an equidigital number, since it uses as much as digits as its factorization.

4851001021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 4851001021 is about 69649.1279270602. The cubic root of 4851001021 is about 1692.8187290677.

The spelling of 4851001021 in words is "four billion, eight hundred fifty-one million, one thousand, twenty-one".