1223168221 has 16 divisors (see below), whose sum is σ = 1394984448. Its totient is φ = 1061636400.

The previous prime is 1223168213. The next prime is 1223168227. The reversal of 1223168221 is 1228613221.

It is not a de Polignac number, because 1223168221 - 2³ = 1223168213 is a prime.

It is a super-2 number, since 2×1223168221² = 2992280993728609682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1223168221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223168227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140230 + ... + 148696.

It is an arithmetic number, because the mean of its divisors is an integer number (87186528).

Almost surely, 2^1223168221 is an apocalyptic number.

1223168221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1223168221 is a deficient number, since it is larger than the sum of its proper divisors (171816227).

1223168221 is a wasteful number, since it uses less digits than its factorization.

1223168221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9072.

The product of its digits is 2304, while the sum is 28.

The square root of 1223168221 is about 34973.8219387015. The cubic root of 1223168221 is about 1069.4538864566.

The spelling of 1223168221 in words is "one billion, two hundred twenty-three million, one hundred sixty-eight thousand, two hundred twenty-one".