203123031123 has 32 divisors (see below), whose sum is σ = 275745254400. Its totient is φ = 132985172736.

The previous prime is 203123031121. The next prime is 203123031143. The reversal of 203123031123 is 321130321302.

It is not a de Polignac number, because 203123031123 - 2¹ = 203123031121 is a prime.

It is a super-2 number, since 2×203123031123² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 203123031123.

It is not an unprimeable number, because it can be changed into a prime (203123031121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18315286 + ... + 18326372.

It is an arithmetic number, because the mean of its divisors is an integer number (8617039200).

Almost surely, 2^203123031123 is an apocalyptic number.

203123031123 is a deficient number, since it is larger than the sum of its proper divisors (72622223277).

203123031123 is a wasteful number, since it uses less digits than its factorization.

203123031123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11691.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 203123031123 its reverse (321130321302), we get a palindrome (524253352425).

The spelling of 203123031123 in words is "two hundred three billion, one hundred twenty-three million, thirty-one thousand, one hundred twenty-three".