31150341324721 has 2 divisors, whose sum is σ = 31150341324722. Its totient is φ = 31150341324720.

The previous prime is 31150341324677. The next prime is 31150341324727. The reversal of 31150341324721 is 12742314305113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31084862144400 + 65479180321 = 5575380^2 + 255889^2 .

It is a cyclic number.

It is not a de Polignac number, because 31150341324721 - 2⁷ = 31150341324593 is a prime.

It is not a weakly prime, because it can be changed into another prime (31150341324727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15575170662360 + 15575170662361.

It is an arithmetic number, because the mean of its divisors is an integer number (15575170662361).

Almost surely, 2^{31150341324721} is an apocalyptic number.

It is an amenable number.

31150341324721 is a deficient number, since it is larger than the sum of its proper divisors (1).

31150341324721 is an equidigital number, since it uses as much as digits as its factorization.

31150341324721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

Adding to 31150341324721 its reverse (12742314305113), we get a palindrome (43892655629834).

The spelling of 31150341324721 in words is "thirty-one trillion, one hundred fifty billion, three hundred forty-one million, three hundred twenty-four thousand, seven hundred twenty-one".