123001321211 has 4 divisors (see below), whose sum is σ = 123030205800. Its totient is φ = 122972436624.

The previous prime is 123001321199. The next prime is 123001321253. The reversal of 123001321211 is 112123100321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112123100321 = 149 ⋅752504029.

It is a cyclic number.

It is not a de Polignac number, because 123001321211 - 2²⁶ = 122934212347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123001321211.

It is not an unprimeable number, because it can be changed into a prime (123001321271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14435906 + ... + 14444423.

It is an arithmetic number, because the mean of its divisors is an integer number (30757551450).

Almost surely, 2^123001321211 is an apocalyptic number.

123001321211 is a deficient number, since it is larger than the sum of its proper divisors (28884589).

123001321211 is an equidigital number, since it uses as much as digits as its factorization.

123001321211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28884588.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 123001321211 its reverse (112123100321), we get a palindrome (235124421532).

The spelling of 123001321211 in words is "one hundred twenty-three billion, one million, three hundred twenty-one thousand, two hundred eleven".