1229108221 has 8 divisors (see below), whose sum is σ = 1345078944. Its totient is φ = 1113843120.

The previous prime is 1229108219. The next prime is 1229108263. The reversal of 1229108221 is 1228019221.

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

It is a cyclic number.

It is not a de Polignac number, because 1229108221 - 2¹ = 1229108219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1229108221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229108521) 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 7 ways as a sum of consecutive naturals, for example, 172755 + ... + 179728.

It is an arithmetic number, because the mean of its divisors is an integer number (168134868).

Almost surely, 2^1229108221 is an apocalyptic number.

1229108221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1229108221 is a deficient number, since it is larger than the sum of its proper divisors (115970723).

1229108221 is a wasteful number, since it uses less digits than its factorization.

1229108221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352811.

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

The square root of 1229108221 is about 35058.6397482846. The cubic root of 1229108221 is about 1071.1822670256.

It can be divided in two parts, 122910 and 8221, that added together give a palindrome (131131).

The spelling of 1229108221 in words is "one billion, two hundred twenty-nine million, one hundred eight thousand, two hundred twenty-one".