123021320203 has 4 divisors (see below), whose sum is σ = 123032771608. Its totient is φ = 123009868800.

The previous prime is 123021320167. The next prime is 123021320237. The reversal of 123021320203 is 302023120321.

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-123021320203 is a prime.

It is a super-2 number, since 2×123021320203² (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 (123021320243) 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, 5709573 + ... + 5731078.

It is an arithmetic number, because the mean of its divisors is an integer number (30758192902).

Almost surely, 2^123021320203 is an apocalyptic number.

123021320203 is a deficient number, since it is larger than the sum of its proper divisors (11451405).

123021320203 is a wasteful number, since it uses less digits than its factorization.

123021320203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11451404.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 123021320203 its reverse (302023120321), we get a palindrome (425044440524).

The spelling of 123021320203 in words is "one hundred twenty-three billion, twenty-one million, three hundred twenty thousand, two hundred three".