203312123001031 has 4 divisors (see below), whose sum is σ = 221795043273864. Its totient is φ = 184829202728200.

The previous prime is 203312123001017. The next prime is 203312123001037. The reversal of 203312123001031 is 130100321213302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203312123001031 is a prime.

It is a super-2 number, since 2×203312123001031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203312123000993 and 203312123001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203312123001037) 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, 9241460136400 + ... + 9241460136421.

It is an arithmetic number, because the mean of its divisors is an integer number (55448760818466).

Almost surely, 2^{203312123001031} is an apocalyptic number.

203312123001031 is a deficient number, since it is larger than the sum of its proper divisors (18482920272833).

203312123001031 is a wasteful number, since it uses less digits than its factorization.

203312123001031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18482920272832.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 203312123001031 its reverse (130100321213302), we get a palindrome (333412444214333).

The spelling of 203312123001031 in words is "two hundred three trillion, three hundred twelve billion, one hundred twenty-three million, one thousand, thirty-one".