123120152403 has 4 divisors (see below), whose sum is σ = 164160203208. Its totient is φ = 82080101600.

The previous prime is 123120152387. The next prime is 123120152429. The reversal of 123120152403 is 304251021321.

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

It is a cyclic number.

It is not a de Polignac number, because 123120152403 - 2⁴ = 123120152387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123120156403) 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, 20520025398 + ... + 20520025403.

It is an arithmetic number, because the mean of its divisors is an integer number (41040050802).

Almost surely, 2^123120152403 is an apocalyptic number.

123120152403 is a deficient number, since it is larger than the sum of its proper divisors (41040050805).

123120152403 is an equidigital number, since it uses as much as digits as its factorization.

123120152403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41040050804.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 123120152403 its reverse (304251021321), we get a palindrome (427371173724).

The spelling of 123120152403 in words is "one hundred twenty-three billion, one hundred twenty million, one hundred fifty-two thousand, four hundred three".