123222121211 has 16 divisors (see below), whose sum is σ = 143230126080. Its totient is φ = 103815777600.

The previous prime is 123222121201. The next prime is 123222121223. The reversal of 123222121211 is 112121222321.

It is a cyclic number.

It is not a de Polignac number, because 123222121211 - 2¹⁴ = 123222104827 is a prime.

It is a super-4 number, since 4×123222121211⁴ (a number of 45 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123222121201) 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, 4735286 + ... + 4761236.

It is an arithmetic number, because the mean of its divisors is an integer number (8951882880).

Almost surely, 2^123222121211 is an apocalyptic number.

123222121211 is a deficient number, since it is larger than the sum of its proper divisors (20008004869).

123222121211 is a wasteful number, since it uses less digits than its factorization.

123222121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37514.

The product of its digits is 192, while the sum is 20.

Adding to 123222121211 its reverse (112121222321), we get a palindrome (235343343532).

The spelling of 123222121211 in words is "one hundred twenty-three billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred eleven".