489101221 has 16 divisors (see below), whose sum is σ = 573553024. Its totient is φ = 408348864.

The previous prime is 489101219. The next prime is 489101293. The reversal of 489101221 is 122101984.

It is not a de Polignac number, because 489101221 - 2¹ = 489101219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 489101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489101521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117451 + ... + 121543.

It is an arithmetic number, because the mean of its divisors is an integer number (35847064).

Almost surely, 2^489101221 is an apocalyptic number.

It is an amenable number.

489101221 is a deficient number, since it is larger than the sum of its proper divisors (84451803).

489101221 is a wasteful number, since it uses less digits than its factorization.

489101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4540.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 489101221 is about 22115.6329549936. The cubic root of 489101221 is about 787.8911984638.

The spelling of 489101221 in words is "four hundred eighty-nine million, one hundred one thousand, two hundred twenty-one".