123133211211 has 4 divisors (see below), whose sum is σ = 164177614952. Its totient is φ = 82088807472.

The previous prime is 123133211189. The next prime is 123133211219. The reversal of 123133211211 is 112112331321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112112331321 = 3 ⋅37370777107.

It is not a de Polignac number, because 123133211211 - 2⁶ = 123133211147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123133211219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20522201866 + ... + 20522201871.

It is an arithmetic number, because the mean of its divisors is an integer number (41044403738).

Almost surely, 2^123133211211 is an apocalyptic number.

123133211211 is a deficient number, since it is larger than the sum of its proper divisors (41044403741).

123133211211 is an equidigital number, since it uses as much as digits as its factorization.

123133211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41044403740.

The product of its digits is 216, while the sum is 21.

Adding to 123133211211 its reverse (112112331321), we get a palindrome (235245542532).

The spelling of 123133211211 in words is "one hundred twenty-three billion, one hundred thirty-three million, two hundred eleven thousand, two hundred eleven".