31020321103 has 2 divisors, whose sum is σ = 31020321104. Its totient is φ = 31020321102.

The previous prime is 31020321083. The next prime is 31020321161. The reversal of 31020321103 is 30112302013.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31020321103 - 2⁵ = 31020321071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31020321203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510160551 + 15510160552.

It is an arithmetic number, because the mean of its divisors is an integer number (15510160552).

Almost surely, 2^31020321103 is an apocalyptic number.

31020321103 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020321103 is an equidigital number, since it uses as much as digits as its factorization.

31020321103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31020321103 its reverse (30112302013), we get a palindrome (61132623116).

The spelling of 31020321103 in words is "thirty-one billion, twenty million, three hundred twenty-one thousand, one hundred three".