123222021 has 16 divisors (see below), whose sum is σ = 177510144. Its totient is φ = 75582144.

The previous prime is 123222019. The next prime is 123222023. The reversal of 123222021 is 120222321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123222019) and next prime (123222023).

It is not a de Polignac number, because 123222021 - 2¹ = 123222019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123222023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7380 + ... + 17346.

It is an arithmetic number, because the mean of its divisors is an integer number (11094384).

Almost surely, 2^123222021 is an apocalyptic number.

It is an amenable number.

123222021 is a deficient number, since it is larger than the sum of its proper divisors (54288123).

123222021 is a wasteful number, since it uses less digits than its factorization.

123222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10300.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 123222021 is about 11100.5414732796. The cubic root of 123222021 is about 497.6180318081.

Adding to 123222021 its reverse (120222321), we get a palindrome (243444342).

The spelling of 123222021 in words is "one hundred twenty-three million, two hundred twenty-two thousand, twenty-one".