203123012313 has 32 divisors (see below), whose sum is σ = 310420809216. Its totient is φ = 117036269568.

The previous prime is 203123012311. The next prime is 203123012369. The reversal of 203123012313 is 313210321302.

It is not a de Polignac number, because 203123012313 - 2¹ = 203123012311 is a prime.

It is a super-2 number, since 2×203123012313² (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 203123012313.

It is not an unprimeable number, because it can be changed into a prime (203123012311) 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, 665745 + ... + 921662.

It is an arithmetic number, because the mean of its divisors is an integer number (9700650288).

Almost surely, 2^203123012313 is an apocalyptic number.

It is an amenable number.

203123012313 is a deficient number, since it is larger than the sum of its proper divisors (107297796903).

203123012313 is a wasteful number, since it uses less digits than its factorization.

203123012313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587633.

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

Adding to 203123012313 its reverse (313210321302), we get a palindrome (516333333615).

The spelling of 203123012313 in words is "two hundred three billion, one hundred twenty-three million, twelve thousand, three hundred thirteen".