203112311303031 has 64 divisors (see below), whose sum is σ = 297110925888000. Its totient is φ = 122658667338240.

The previous prime is 203112311303009. The next prime is 203112311303101. The reversal of 203112311303031 is 130303113211302.

It is a de Polignac number, because none of the positive numbers 2^k-203112311303031 is a prime.

It is a super-2 number, since 2×203112311303031² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 203112311302992 and 203112311303010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203112311303131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5189492460 + ... + 5189531598.

It is an arithmetic number, because the mean of its divisors is an integer number (4642358217000).

Almost surely, 2^{203112311303031} is an apocalyptic number.

203112311303031 is a deficient number, since it is larger than the sum of its proper divisors (93998614584969).

203112311303031 is a wasteful number, since it uses less digits than its factorization.

203112311303031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43104.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 203112311303031 its reverse (130303113211302), we get a palindrome (333415424514333).

The spelling of 203112311303031 in words is "two hundred three trillion, one hundred twelve billion, three hundred eleven million, three hundred three thousand, thirty-one".