21331322010001 has 2 divisors, whose sum is σ = 21331322010002. Its totient is φ = 21331322010000.

The previous prime is 21331322009993. The next prime is 21331322010049. The reversal of 21331322010001 is 10001022313312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16195183656976 + 5136138353025 = 4024324^2 + 2266305^2 .

It is a cyclic number.

It is not a de Polignac number, because 21331322010001 - 2³ = 21331322009993 is a prime.

It is not a weakly prime, because it can be changed into another prime (21331322010071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665661005000 + 10665661005001.

It is an arithmetic number, because the mean of its divisors is an integer number (10665661005001).

Almost surely, 2^{21331322010001} is an apocalyptic number.

It is an amenable number.

21331322010001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21331322010001 is an equidigital number, since it uses as much as digits as its factorization.

21331322010001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21331322010001 its reverse (10001022313312), we get a palindrome (31332344323313).

The spelling of 21331322010001 in words is "twenty-one trillion, three hundred thirty-one billion, three hundred twenty-two million, ten thousand, one".