21000323013203 has 2 divisors, whose sum is σ = 21000323013204. Its totient is φ = 21000323013202.

The previous prime is 21000323013083. The next prime is 21000323013217. The reversal of 21000323013203 is 30231032300012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21000323013203 - 2²⁶ = 21000255904339 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000323018203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500161506601 + 10500161506602.

It is an arithmetic number, because the mean of its divisors is an integer number (10500161506602).

Almost surely, 2^{21000323013203} is an apocalyptic number.

21000323013203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000323013203 is an equidigital number, since it uses as much as digits as its factorization.

21000323013203 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 20.

Adding to 21000323013203 its reverse (30231032300012), we get a palindrome (51231355313215).

The spelling of 21000323013203 in words is "twenty-one trillion, three hundred twenty-three million, thirteen thousand, two hundred three".