123221211 has 16 divisors (see below), whose sum is σ = 169123104. Its totient is φ = 79743744.

The previous prime is 123221191. The next prime is 123221221. The reversal of 123221211 is 112122321.

It is not a de Polignac number, because 123221211 - 2⁵ = 123221179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123221221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60831 + ... + 62823.

It is an arithmetic number, because the mean of its divisors is an integer number (10570194).

Almost surely, 2^123221211 is an apocalyptic number.

123221211 is a deficient number, since it is larger than the sum of its proper divisors (45901893).

123221211 is a wasteful number, since it uses less digits than its factorization.

123221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590.

The product of its digits is 48, while the sum is 15.

The square root of 123221211 is about 11100.5049885129. The cubic root of 123221211 is about 497.6169414416.

Adding to 123221211 its reverse (112122321), we get a palindrome (235343532).

It can be divided in two parts, 12 and 3221211, that added together give a palindrome (3221223).

The spelling of 123221211 in words is "one hundred twenty-three million, two hundred twenty-one thousand, two hundred eleven".