123220444213 has 4 divisors (see below), whose sum is σ = 125842155840. Its totient is φ = 120598732588.

The previous prime is 123220444211. The next prime is 123220444223. The reversal of 123220444213 is 312444022321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123220444213 - 2¹ = 123220444211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123220444211) 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, 1310855743 + ... + 1310855836.

It is an arithmetic number, because the mean of its divisors is an integer number (31460538960).

Almost surely, 2^123220444213 is an apocalyptic number.

It is an amenable number.

123220444213 is a deficient number, since it is larger than the sum of its proper divisors (2621711627).

123220444213 is an equidigital number, since it uses as much as digits as its factorization.

123220444213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621711626.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 123220444213 its reverse (312444022321), we get a palindrome (435664466534).

The spelling of 123220444213 in words is "one hundred twenty-three billion, two hundred twenty million, four hundred forty-four thousand, two hundred thirteen".