21313002287 has 2 divisors, whose sum is σ = 21313002288. Its totient is φ = 21313002286.

The previous prime is 21313002241. The next prime is 21313002383. The reversal of 21313002287 is 78220031312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21313002287 - 2¹⁶ = 21312936751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21313002587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656501143 + 10656501144.

It is an arithmetic number, because the mean of its divisors is an integer number (10656501144).

Almost surely, 2^21313002287 is an apocalyptic number.

21313002287 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313002287 is an equidigital number, since it uses as much as digits as its factorization.

21313002287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 21313002287 its reverse (78220031312), we get a palindrome (99533033599).

The spelling of 21313002287 in words is "twenty-one billion, three hundred thirteen million, two thousand, two hundred eighty-seven".