21321310203211 has 2 divisors, whose sum is σ = 21321310203212. Its totient is φ = 21321310203210.

The previous prime is 21321310203169. The next prime is 21321310203311. The reversal of 21321310203211 is 11230201312312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21321310203211 - 2²⁵ = 21321276648779 is a prime.

It is a super-2 number, since 2×21321310203211² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21321310203311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660655101605 + 10660655101606.

It is an arithmetic number, because the mean of its divisors is an integer number (10660655101606).

Almost surely, 2^{21321310203211} is an apocalyptic number.

21321310203211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21321310203211 is an equidigital number, since it uses as much as digits as its factorization.

21321310203211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21321310203211 its reverse (11230201312312), we get a palindrome (32551511515523).

The spelling of 21321310203211 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred ten million, two hundred three thousand, two hundred eleven".