123123132211 has 4 divisors (see below), whose sum is σ = 123638292000. Its totient is φ = 122607972424.

The previous prime is 123123132199. The next prime is 123123132259. The reversal of 123123132211 is 112231321321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123123132211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123123832211) 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, 257579536 + ... + 257580013.

It is an arithmetic number, because the mean of its divisors is an integer number (30909573000).

Almost surely, 2^123123132211 is an apocalyptic number.

123123132211 is a deficient number, since it is larger than the sum of its proper divisors (515159789).

123123132211 is an equidigital number, since it uses as much as digits as its factorization.

123123132211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515159788.

The product of its digits is 432, while the sum is 22.

Adding to 123123132211 its reverse (112231321321), we get a palindrome (235354453532).

The spelling of 123123132211 in words is "one hundred twenty-three billion, one hundred twenty-three million, one hundred thirty-two thousand, two hundred eleven".