22016433216221 has 4 divisors (see below), whose sum is σ = 23175192859200. Its totient is φ = 20857673573244.

The previous prime is 22016433216179. The next prime is 22016433216251. The reversal of 22016433216221 is 12261233461022.

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 22016433216221 - 2⁶ = 22016433216157 is a prime.

It is a super-2 number, since 2×22016433216221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22016433216251) 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, 579379821461 + ... + 579379821498.

It is an arithmetic number, because the mean of its divisors is an integer number (5793798214800).

Almost surely, 2^{22016433216221} is an apocalyptic number.

It is an amenable number.

22016433216221 is a deficient number, since it is larger than the sum of its proper divisors (1158759642979).

22016433216221 is a wasteful number, since it uses less digits than its factorization.

22016433216221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158759642978.

The product of its (nonzero) digits is 41472, while the sum is 35.

Adding to 22016433216221 its reverse (12261233461022), we get a palindrome (34277666677243).

The spelling of 22016433216221 in words is "twenty-two trillion, sixteen billion, four hundred thirty-three million, two hundred sixteen thousand, two hundred twenty-one".