123012020203 has 4 divisors (see below), whose sum is σ = 123018982648. Its totient is φ = 123005057760.

The previous prime is 123012020161. The next prime is 123012020227. The reversal of 123012020203 is 302020210321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123012020203 is a prime.

It is a super-2 number, since 2×123012020203² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123012020293) 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, 3454653 + ... + 3490078.

It is an arithmetic number, because the mean of its divisors is an integer number (30754745662).

Almost surely, 2^123012020203 is an apocalyptic number.

123012020203 is a deficient number, since it is larger than the sum of its proper divisors (6962445).

123012020203 is an equidigital number, since it uses as much as digits as its factorization.

123012020203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6962444.

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

Adding to 123012020203 its reverse (302020210321), we get a palindrome (425032230524).

The spelling of 123012020203 in words is "one hundred twenty-three billion, twelve million, twenty thousand, two hundred three".