21616232122243 has 8 divisors (see below), whose sum is σ = 23582918186496. Its totient is φ = 19649808400200.

The previous prime is 21616232122237. The next prime is 21616232122271. The reversal of 21616232122243 is 34222123261612.

It is a happy number.

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

It is not a de Polignac number, because 21616232122243 - 2²⁹ = 21615695251331 is a prime.

It is a super-2 number, since 2×21616232122243² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21616232162243) 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, 65413243 + ... + 65742868.

It is an arithmetic number, because the mean of its divisors is an integer number (2947864773312).

Almost surely, 2^{21616232122243} is an apocalyptic number.

21616232122243 is a deficient number, since it is larger than the sum of its proper divisors (1966686064253).

21616232122243 is a wasteful number, since it uses less digits than its factorization.

21616232122243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131171105.

The product of its digits is 82944, while the sum is 37.

Adding to 21616232122243 its reverse (34222123261612), we get a palindrome (55838355383855).

The spelling of 21616232122243 in words is "twenty-one trillion, six hundred sixteen billion, two hundred thirty-two million, one hundred twenty-two thousand, two hundred forty-three".