31021104073 has 2 divisors, whose sum is σ = 31021104074. Its totient is φ = 31021104072.

The previous prime is 31021104071. The next prime is 31021104119. The reversal of 31021104073 is 37040112013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19163418624 + 11857685449 = 138432^2 + 108893^2 .

It is a cyclic number.

It is not a de Polignac number, because 31021104073 - 2¹ = 31021104071 is a prime.

Together with 31021104071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31021104071) 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, 15510552036 + 15510552037.

It is an arithmetic number, because the mean of its divisors is an integer number (15510552037).

Almost surely, 2^31021104073 is an apocalyptic number.

It is an amenable number.

31021104073 is a deficient number, since it is larger than the sum of its proper divisors (1).

31021104073 is an equidigital number, since it uses as much as digits as its factorization.

31021104073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

Adding to 31021104073 its reverse (37040112013), we get a palindrome (68061216086).

The spelling of 31021104073 in words is "thirty-one billion, twenty-one million, one hundred four thousand, seventy-three".