123271201623 has 4 divisors (see below), whose sum is σ = 164361602168. Its totient is φ = 82180801080.

The previous prime is 123271201621. The next prime is 123271201657. The reversal of 123271201623 is 326102172321.

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

It is not a de Polignac number, because 123271201623 - 2¹ = 123271201621 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 (123271201621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20545200268 + ... + 20545200273.

It is an arithmetic number, because the mean of its divisors is an integer number (41090400542).

Almost surely, 2^123271201623 is an apocalyptic number.

123271201623 is a deficient number, since it is larger than the sum of its proper divisors (41090400545).

123271201623 is an equidigital number, since it uses as much as digits as its factorization.

123271201623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41090400544.

The product of its (nonzero) digits is 6048, while the sum is 30.

Adding to 123271201623 its reverse (326102172321), we get a palindrome (449373373944).

The spelling of 123271201623 in words is "one hundred twenty-three billion, two hundred seventy-one million, two hundred one thousand, six hundred twenty-three".