21132001333171 has 2 divisors, whose sum is σ = 21132001333172. Its totient is φ = 21132001333170.

The previous prime is 21132001333153. The next prime is 21132001333231. The reversal of 21132001333171 is 17133310023112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21132001333171 - 2³¹ = 21129853849523 is a prime.

It is a super-2 number, since 2×21132001333171² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21132001333271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566000666585 + 10566000666586.

It is an arithmetic number, because the mean of its divisors is an integer number (10566000666586).

Almost surely, 2^{21132001333171} is an apocalyptic number.

21132001333171 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132001333171 is an equidigital number, since it uses as much as digits as its factorization.

21132001333171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

Adding to 21132001333171 its reverse (17133310023112), we get a palindrome (38265311356283).

The spelling of 21132001333171 in words is "twenty-one trillion, one hundred thirty-two billion, one million, three hundred thirty-three thousand, one hundred seventy-one".