16422067221 has 32 divisors (see below), whose sum is σ = 25553817600. Its totient is φ = 9377050032.

The previous prime is 16422067219. The next prime is 16422067231. The reversal of 16422067221 is 12276022461.

It is not a de Polignac number, because 16422067221 - 2¹ = 16422067219 is a prime.

It is a super-2 number, since 2×16422067221² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16422067231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1582576 + ... + 1592918.

It is an arithmetic number, because the mean of its divisors is an integer number (798556800).

Almost surely, 2^16422067221 is an apocalyptic number.

It is an amenable number.

16422067221 is a deficient number, since it is larger than the sum of its proper divisors (9131750379).

16422067221 is a wasteful number, since it uses less digits than its factorization.

16422067221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11910 (or 11896 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

Adding to 16422067221 its reverse (12276022461), we get a palindrome (28698089682).

The spelling of 16422067221 in words is "sixteen billion, four hundred twenty-two million, sixty-seven thousand, two hundred twenty-one".