121211223 has 32 divisors (see below), whose sum is σ = 190746624. Its totient is φ = 67018752.

The previous prime is 121211221. The next prime is 121211227. The reversal of 121211223 is 322112121.

It is not a de Polignac number, because 121211223 - 2¹ = 121211221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199386 + ... + 199992.

It is an arithmetic number, because the mean of its divisors is an integer number (5960832).

Almost surely, 2^121211223 is an apocalyptic number.

121211223 is a deficient number, since it is larger than the sum of its proper divisors (69535401).

121211223 is a wasteful number, since it uses less digits than its factorization.

121211223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911.

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

The square root of 121211223 is about 11009.5968591043. The cubic root of 121211223 is about 494.8963807186.

Adding to 121211223 its reverse (322112121), we get a palindrome (443323344).

The spelling of 121211223 in words is "one hundred twenty-one million, two hundred eleven thousand, two hundred twenty-three".