31420421203 has 2 divisors, whose sum is σ = 31420421204. Its totient is φ = 31420421202.

The previous prime is 31420421191. The next prime is 31420421209. The reversal of 31420421203 is 30212402413.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31420421203 is a prime.

It is not a weakly prime, because it can be changed into another prime (31420421209) 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 as a sum of consecutive naturals, namely, 15710210601 + 15710210602.

It is an arithmetic number, because the mean of its divisors is an integer number (15710210602).

Almost surely, 2^31420421203 is an apocalyptic number.

31420421203 is a deficient number, since it is larger than the sum of its proper divisors (1).

31420421203 is an equidigital number, since it uses as much as digits as its factorization.

31420421203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 31420421203 its reverse (30212402413), we get a palindrome (61632823616).

The spelling of 31420421203 in words is "thirty-one billion, four hundred twenty million, four hundred twenty-one thousand, two hundred three".