31321031331103 has 2 divisors, whose sum is σ = 31321031331104. Its totient is φ = 31321031331102.

The previous prime is 31321031331043. The next prime is 31321031331143. The reversal of 31321031331103 is 30113313012313.

It is a strong prime.

It is an emirp because it is prime and its reverse (30113313012313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31321031331103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31321031331143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660515665551 + 15660515665552.

It is an arithmetic number, because the mean of its divisors is an integer number (15660515665552).

Almost surely, 2^{31321031331103} is an apocalyptic number.

31321031331103 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321031331103 is an equidigital number, since it uses as much as digits as its factorization.

31321031331103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 31321031331103 its reverse (30113313012313), we get a palindrome (61434344343416).

The spelling of 31321031331103 in words is "thirty-one trillion, three hundred twenty-one billion, thirty-one million, three hundred thirty-one thousand, one hundred three".