31120130310121 has 2 divisors, whose sum is σ = 31120130310122. Its totient is φ = 31120130310120.

The previous prime is 31120130310079. The next prime is 31120130310151. The reversal of 31120130310121 is 12101303102113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16060577229225 + 15059553080896 = 4007565^2 + 3880664^2 .

It is an emirp because it is prime and its reverse (12101303102113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31120130310121 - 2⁷ = 31120130309993 is a prime.

It is not a weakly prime, because it can be changed into another prime (31120130310151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15560065155060 + 15560065155061.

It is an arithmetic number, because the mean of its divisors is an integer number (15560065155061).

Almost surely, 2^{31120130310121} is an apocalyptic number.

It is an amenable number.

31120130310121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31120130310121 is an equidigital number, since it uses as much as digits as its factorization.

31120130310121 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 19.

Adding to 31120130310121 its reverse (12101303102113), we get a palindrome (43221433412234).

The spelling of 31120130310121 in words is "thirty-one trillion, one hundred twenty billion, one hundred thirty million, three hundred ten thousand, one hundred twenty-one".