21230231032313 has 2 divisors, whose sum is σ = 21230231032314. Its totient is φ = 21230231032312.

The previous prime is 21230231032301. The next prime is 21230231032499. The reversal of 21230231032313 is 31323013203212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21093931252969 + 136299779344 = 4592813^2 + 369188^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230231032313 - 2⁶ = 21230231032249 is a prime.

It is not a weakly prime, because it can be changed into another prime (21200231032313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615115516156 + 10615115516157.

It is an arithmetic number, because the mean of its divisors is an integer number (10615115516157).

Almost surely, 2^{21230231032313} is an apocalyptic number.

It is an amenable number.

21230231032313 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230231032313 is an equidigital number, since it uses as much as digits as its factorization.

21230231032313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21230231032313 its reverse (31323013203212), we get a palindrome (52553244235525).

The spelling of 21230231032313 in words is "twenty-one trillion, two hundred thirty billion, two hundred thirty-one million, thirty-two thousand, three hundred thirteen".