203021321031 has 12 divisors (see below), whose sum is σ = 294544885752. Its totient is φ = 134751301296.

The previous prime is 203021320951. The next prime is 203021321077. The reversal of 203021321031 is 130123120302.

It is not a de Polignac number, because 203021321031 - 2¹⁸ = 203021058887 is a prime.

It is a super-2 number, since 2×203021321031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 203021320995 and 203021321013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203021321231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49685016 + ... + 49689101.

It is an arithmetic number, because the mean of its divisors is an integer number (24545407146).

Almost surely, 2^203021321031 is an apocalyptic number.

203021321031 is a deficient number, since it is larger than the sum of its proper divisors (91523564721).

203021321031 is a wasteful number, since it uses less digits than its factorization.

203021321031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99374350 (or 99374347 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 203021321031 its reverse (130123120302), we get a palindrome (333144441333).

The spelling of 203021321031 in words is "two hundred three billion, twenty-one million, three hundred twenty-one thousand, thirty-one".