123223021212 has 24 divisors (see below), whose sum is σ = 287776443136. Its totient is φ = 41037760368.

The previous prime is 123223021189. The next prime is 123223021253. The reversal of 123223021212 is 212120322321.

It is a super-2 number, since 2×123223021212² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 4558468 + ... + 4585419.

Almost surely, 2^123223021212 is an apocalyptic number.

123223021212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123223021212 is an abundant number, since it is smaller than the sum of its proper divisors (164553421924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123223021212 is a wasteful number, since it uses less digits than its factorization.

123223021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9145017 (or 9145015 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 123223021212 its reverse (212120322321), we get a palindrome (335343343533).

The spelling of 123223021212 in words is "one hundred twenty-three billion, two hundred twenty-three million, twenty-one thousand, two hundred twelve".