21303123032101 has 2 divisors, whose sum is σ = 21303123032102. Its totient is φ = 21303123032100.

The previous prime is 21303123032089. The next prime is 21303123032123. The reversal of 21303123032101 is 10123032130312.

It is an a-pointer prime, because the next prime (21303123032123) can be obtained adding 21303123032101 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20786751444001 + 516371588100 = 4559249^2 + 718590^2 .

It is a cyclic number.

It is not a de Polignac number, because 21303123032101 - 2¹¹ = 21303123030053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21303123032161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651561516050 + 10651561516051.

It is an arithmetic number, because the mean of its divisors is an integer number (10651561516051).

Almost surely, 2^{21303123032101} is an apocalyptic number.

It is an amenable number.

21303123032101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303123032101 is an equidigital number, since it uses as much as digits as its factorization.

21303123032101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21303123032101 its reverse (10123032130312), we get a palindrome (31426155162413).

The spelling of 21303123032101 in words is "twenty-one trillion, three hundred three billion, one hundred twenty-three million, thirty-two thousand, one hundred one".