123223022221 has 12 divisors (see below), whose sum is σ = 133467576660. Its totient is φ = 113713017600.

The previous prime is 123223022191. The next prime is 123223022227. The reversal of 123223022221 is 122220322321.

It can be written as a sum of positive squares in 6 ways, for example, as 13652754025 + 109570268196 = 116845^2 + 331014^2 .

It is not a de Polignac number, because 123223022221 - 2¹⁷ = 123222891149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123223022192 and 123223022201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123223022227) 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 11 ways as a sum of consecutive naturals, for example, 526965 + ... + 723973.

It is an arithmetic number, because the mean of its divisors is an integer number (11122298055).

Almost surely, 2^123223022221 is an apocalyptic number.

It is an amenable number.

123223022221 is a deficient number, since it is larger than the sum of its proper divisors (10244554439).

123223022221 is a wasteful number, since it uses less digits than its factorization.

123223022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200736 (or 200723 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 123223022221 its reverse (122220322321), we get a palindrome (245443344542).

The spelling of 123223022221 in words is "one hundred twenty-three billion, two hundred twenty-three million, twenty-two thousand, two hundred twenty-one".