211404342321 has 24 divisors (see below), whose sum is σ = 308994791040. Its totient is φ = 139261548096.

The previous prime is 211404342269. The next prime is 211404342349. The reversal of 211404342321 is 123243404112.

211404342321 is a `hidden beast` number, since 21 + 1 + 404 + 3 + 4 + 232 + 1 = 666.

It is not a de Polignac number, because 211404342321 - 2⁶ = 211404342257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211404342221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1150420 + ... + 1321466.

It is an arithmetic number, because the mean of its divisors is an integer number (12874782960).

Almost surely, 2^211404342321 is an apocalyptic number.

It is an amenable number.

211404342321 is a deficient number, since it is larger than the sum of its proper divisors (97590448719).

211404342321 is a wasteful number, since it uses less digits than its factorization.

211404342321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172685 (or 172682 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 211404342321 its reverse (123243404112), we get a palindrome (334647746433).

The spelling of 211404342321 in words is "two hundred eleven billion, four hundred four million, three hundred forty-two thousand, three hundred twenty-one".