123211201323213 has 6 divisors (see below), whose sum is σ = 177971735244654. Its totient is φ = 82140800882136.

The previous prime is 123211201323167. The next prime is 123211201323251. The reversal of 123211201323213 is 312323102112321.

123211201323213 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 1 + 120 + 1 + 323 + 213 = 666.

It can be written as a sum of positive squares in only one way, i.e., 120076931193444 + 3134270129769 = 10957962^2 + 1770387^2 .

It is not a de Polignac number, because 123211201323213 - 2¹² = 123211201319117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123211201321213) 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 5 ways as a sum of consecutive naturals, for example, 6845066740170 + ... + 6845066740187.

It is an arithmetic number, because the mean of its divisors is an integer number (29661955874109).

Almost surely, 2^{123211201323213} is an apocalyptic number.

It is an amenable number.

123211201323213 is a deficient number, since it is larger than the sum of its proper divisors (54760533921441).

123211201323213 is a wasteful number, since it uses less digits than its factorization.

123211201323213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13690133480363 (or 13690133480360 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 123211201323213 its reverse (312323102112321), we get a palindrome (435534303435534).

The spelling of 123211201323213 in words is "one hundred twenty-three trillion, two hundred eleven billion, two hundred one million, three hundred twenty-three thousand, two hundred thirteen".