211132560495421 has 2 divisors, whose sum is σ = 211132560495422. Its totient is φ = 211132560495420.

The previous prime is 211132560495419. The next prime is 211132560495433. The reversal of 211132560495421 is 124594065231112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206740543325625 + 4392017169796 = 14378475^2 + 2095714^2 .

It is a cyclic number.

It is not a de Polignac number, because 211132560495421 - 2¹ = 211132560495419 is a prime.

Together with 211132560495419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211132560495221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105566280247710 + 105566280247711.

It is an arithmetic number, because the mean of its divisors is an integer number (105566280247711).

Almost surely, 2^{211132560495421} is an apocalyptic number.

It is an amenable number.

211132560495421 is a deficient number, since it is larger than the sum of its proper divisors (1).

211132560495421 is an equidigital number, since it uses as much as digits as its factorization.

211132560495421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 211132560495421 in words is "two hundred eleven trillion, one hundred thirty-two billion, five hundred sixty million, four hundred ninety-five thousand, four hundred twenty-one".