211331342321 has 4 divisors (see below), whose sum is σ = 230543282544. Its totient is φ = 192119402100.

The previous prime is 211331342317. The next prime is 211331342323. The reversal of 211331342321 is 123243133112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211331342321 - 2² = 211331342317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211331342323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9605970095 + ... + 9605970116.

It is an arithmetic number, because the mean of its divisors is an integer number (57635820636).

Almost surely, 2^211331342321 is an apocalyptic number.

It is an amenable number.

211331342321 is a deficient number, since it is larger than the sum of its proper divisors (19211940223).

211331342321 is a wasteful number, since it uses less digits than its factorization.

211331342321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19211940222.

The product of its digits is 2592, while the sum is 26.

Adding to 211331342321 its reverse (123243133112), we get a palindrome (334574475433).

The spelling of 211331342321 in words is "two hundred eleven billion, three hundred thirty-one million, three hundred forty-two thousand, three hundred twenty-one".