1021402013 has 2 divisors, whose sum is σ = 1021402014. Its totient is φ = 1021402012.

The previous prime is 1021402001. The next prime is 1021402051. The reversal of 1021402013 is 3102041201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 799928089 + 221473924 = 28283^2 + 14882^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021402013 - 2⁸ = 1021401757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021402813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510701006 + 510701007.

It is an arithmetic number, because the mean of its divisors is an integer number (510701007).

Almost surely, 2^1021402013 is an apocalyptic number.

It is an amenable number.

1021402013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021402013 is an equidigital number, since it uses as much as digits as its factorization.

1021402013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1021402013 is about 31959.3806729730. The cubic root of 1021402013 is about 1007.0837069450.

Adding to 1021402013 its reverse (3102041201), we get a palindrome (4123443214).

The spelling of 1021402013 in words is "one billion, twenty-one million, four hundred two thousand, thirteen".