123221111 has 12 divisors (see below), whose sum is σ = 134768520. Its totient is φ = 112600800.

The previous prime is 123221071. The next prime is 123221129. The reversal of 123221111 is 111122321.

It is not a de Polignac number, because 123221111 - 2⁶ = 123221047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123221141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13460 + ... + 20678.

It is an arithmetic number, because the mean of its divisors is an integer number (11230710).

Almost surely, 2^123221111 is an apocalyptic number.

123221111 is a deficient number, since it is larger than the sum of its proper divisors (11547409).

123221111 is a wasteful number, since it uses less digits than its factorization.

123221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7346 (or 7333 counting only the distinct ones).

The product of its digits is 24, while the sum is 14.

The square root of 123221111 is about 11100.5004842124. The cubic root of 123221111 is about 497.6168068281.

Adding to 123221111 its reverse (111122321), we get a palindrome (234343432).

The spelling of 123221111 in words is "one hundred twenty-three million, two hundred twenty-one thousand, one hundred eleven".