203321320031 has 2 divisors, whose sum is σ = 203321320032. Its totient is φ = 203321320030.

The previous prime is 203321319977. The next prime is 203321320049. The reversal of 203321320031 is 130023123302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203321320031 is a prime.

It is a super-2 number, since 2×203321320031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 203321319985 and 203321320012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203321328031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101660660015 + 101660660016.

It is an arithmetic number, because the mean of its divisors is an integer number (101660660016).

Almost surely, 2^203321320031 is an apocalyptic number.

203321320031 is a deficient number, since it is larger than the sum of its proper divisors (1).

203321320031 is an equidigital number, since it uses as much as digits as its factorization.

203321320031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 203321320031 its reverse (130023123302), we get a palindrome (333344443333).

The spelling of 203321320031 in words is "two hundred three billion, three hundred twenty-one million, three hundred twenty thousand, thirty-one".