21225030171 has 8 divisors (see below), whose sum is σ = 28303942464. Its totient is φ = 14148069000.

The previous prime is 21225030143. The next prime is 21225030181. The reversal of 21225030171 is 17103052212.

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

It is not a de Polignac number, because 21225030171 - 2¹⁴ = 21225013787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21225030181) 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, 462205 + ... + 506046.

It is an arithmetic number, because the mean of its divisors is an integer number (3537992808).

Almost surely, 2^21225030171 is an apocalyptic number.

21225030171 is a deficient number, since it is larger than the sum of its proper divisors (7078912293).

21225030171 is an equidigital number, since it uses as much as digits as its factorization.

21225030171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975561.

The product of its (nonzero) digits is 840, while the sum is 24.

Adding to 21225030171 its reverse (17103052212), we get a palindrome (38328082383).

The spelling of 21225030171 in words is "twenty-one billion, two hundred twenty-five million, thirty thousand, one hundred seventy-one".