16017022221 has 8 divisors (see below), whose sum is σ = 21367700544. Its totient is φ = 10672179360.

The previous prime is 16017022201. The next prime is 16017022267. The reversal of 16017022221 is 12222071061.

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

It is not a de Polignac number, because 16017022221 - 2¹³ = 16017014029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16017022191 and 16017022200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16017022201) 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, 1452456 + ... + 1463441.

It is an arithmetic number, because the mean of its divisors is an integer number (2670962568).

Almost surely, 2^16017022221 is an apocalyptic number.

It is an amenable number.

16017022221 is a deficient number, since it is larger than the sum of its proper divisors (5350678323).

16017022221 is a wasteful number, since it uses less digits than its factorization.

16017022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917731.

The product of its (nonzero) digits is 672, while the sum is 24.

Adding to 16017022221 its reverse (12222071061), we get a palindrome (28239093282).

The spelling of 16017022221 in words is "sixteen billion, seventeen million, twenty-two thousand, two hundred twenty-one".