203110123009 has 4 divisors (see below), whose sum is σ = 203129282304. Its totient is φ = 203090963716.

The previous prime is 203110122997. The next prime is 203110123033. The reversal of 203110123009 is 900321011302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 203110123009 - 2⁹ = 203110122497 is a prime.

It is a super-2 number, since 2×203110123009² (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 (203110127009) 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, 9563737 + ... + 9584950.

It is an arithmetic number, because the mean of its divisors is an integer number (50782320576).

Almost surely, 2^203110123009 is an apocalyptic number.

It is an amenable number.

203110123009 is a deficient number, since it is larger than the sum of its proper divisors (19159295).

203110123009 is a wasteful number, since it uses less digits than its factorization.

203110123009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19159294.

The product of its (nonzero) digits is 324, while the sum is 22.

The spelling of 203110123009 in words is "two hundred three billion, one hundred ten million, one hundred twenty-three thousand, nine".