21000032302313 has 2 divisors, whose sum is σ = 21000032302314. Its totient is φ = 21000032302312.

The previous prime is 21000032302267. The next prime is 21000032302357. The reversal of 21000032302313 is 31320323000012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20969411502169 + 30620800144 = 4579237^2 + 174988^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21000032302313 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000032302373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500016151156 + 10500016151157.

It is an arithmetic number, because the mean of its divisors is an integer number (10500016151157).

Almost surely, 2^{21000032302313} is an apocalyptic number.

It is an amenable number.

21000032302313 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000032302313 is an equidigital number, since it uses as much as digits as its factorization.

21000032302313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21000032302313 its reverse (31320323000012), we get a palindrome (52320355302325).

The spelling of 21000032302313 in words is "twenty-one trillion, thirty-two million, three hundred two thousand, three hundred thirteen".