22172017021 has 32 divisors (see below), whose sum is σ = 28511170560. Its totient is φ = 16741608000.

The previous prime is 22172017001. The next prime is 22172017027. The reversal of 22172017021 is 12071027122.

It is a cyclic number.

It is not a de Polignac number, because 22172017021 - 2¹³ = 22172008829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22172017027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 335190 + ... + 395848.

It is an arithmetic number, because the mean of its divisors is an integer number (890974080).

Almost surely, 2^22172017021 is an apocalyptic number.

It is an amenable number.

22172017021 is a deficient number, since it is larger than the sum of its proper divisors (6339153539).

22172017021 is a wasteful number, since it uses less digits than its factorization.

22172017021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60825.

The product of its (nonzero) digits is 784, while the sum is 25.

It can be divided in two parts, 2217201 and 7021, that added together give a palindrome (2224222).

The spelling of 22172017021 in words is "twenty-two billion, one hundred seventy-two million, seventeen thousand, twenty-one".