10123020403 has 4 divisors (see below), whose sum is σ = 10294597080. Its totient is φ = 9951443728.

The previous prime is 10123020389. The next prime is 10123020443. The reversal of 10123020403 is 30402032101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30402032101 = 7 ⋅4343147443.

It is a cyclic number.

It is not a de Polignac number, because 10123020403 - 2²¹ = 10120923251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10123020443) 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, 85788250 + ... + 85788367.

It is an arithmetic number, because the mean of its divisors is an integer number (2573649270).

Almost surely, 2^10123020403 is an apocalyptic number.

10123020403 is a deficient number, since it is larger than the sum of its proper divisors (171576677).

10123020403 is an equidigital number, since it uses as much as digits as its factorization.

10123020403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171576676.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 10123020403 its reverse (30402032101), we get a palindrome (40525052504).

The spelling of 10123020403 in words is "ten billion, one hundred twenty-three million, twenty thousand, four hundred three".