211616122321 has 8 divisors (see below), whose sum is σ = 212637701088. Its totient is φ = 210594720000.

The previous prime is 211616122253. The next prime is 211616122339. The reversal of 211616122321 is 123221616112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211616122321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211616122321.

It is not an unprimeable number, because it can be changed into a prime (211616122391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2800881 + ... + 2875441.

It is an arithmetic number, because the mean of its divisors is an integer number (26579712636).

Almost surely, 2^211616122321 is an apocalyptic number.

It is an amenable number.

211616122321 is a deficient number, since it is larger than the sum of its proper divisors (1021578767).

211616122321 is a wasteful number, since it uses less digits than its factorization.

211616122321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88223.

The product of its digits is 1728, while the sum is 28.

Adding to 211616122321 its reverse (123221616112), we get a palindrome (334837738433).

The spelling of 211616122321 in words is "two hundred eleven billion, six hundred sixteen million, one hundred twenty-two thousand, three hundred twenty-one".