203123120011 has 8 divisors (see below), whose sum is σ = 232145917664. Its totient is φ = 174101624640.

The previous prime is 203123120003. The next prime is 203123120021. The reversal of 203123120011 is 110021321302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 203123120011 - 2³ = 203123120003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203123120021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35341 + ... + 638353.

It is an arithmetic number, because the mean of its divisors is an integer number (29018239708).

Almost surely, 2^203123120011 is an apocalyptic number.

203123120011 is a deficient number, since it is larger than the sum of its proper divisors (29022797653).

203123120011 is an equidigital number, since it uses as much as digits as its factorization.

203123120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651141.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 203123120011 its reverse (110021321302), we get a palindrome (313144441313).

The spelling of 203123120011 in words is "two hundred three billion, one hundred twenty-three million, one hundred twenty thousand, eleven".