1021420313 has 2 divisors, whose sum is σ = 1021420314. Its totient is φ = 1021420312.

The previous prime is 1021420303. The next prime is 1021420319. The reversal of 1021420313 is 3130241201.

1021420313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1015505689 + 5914624 = 31867^2 + 2432^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021420313 - 2¹⁸ = 1021158169 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1021420291 and 1021420300.

It is not a weakly prime, because it can be changed into another prime (1021420319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510710156 + 510710157.

It is an arithmetic number, because the mean of its divisors is an integer number (510710157).

Almost surely, 2^1021420313 is an apocalyptic number.

It is an amenable number.

1021420313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021420313 is an equidigital number, since it uses as much as digits as its factorization.

1021420313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1021420313 is about 31959.6669726078. Note that the first 3 decimals coincide. The cubic root of 1021420313 is about 1007.0897213976.

Adding to 1021420313 its reverse (3130241201), we get a palindrome (4151661514).

The spelling of 1021420313 in words is "one billion, twenty-one million, four hundred twenty thousand, three hundred thirteen".