312103030112221 has 2 divisors, whose sum is σ = 312103030112222. Its totient is φ = 312103030112220.

The previous prime is 312103030112179. The next prime is 312103030112261. The reversal of 312103030112221 is 122211030301213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 286248703480996 + 25854326631225 = 16918886^2 + 5084715^2 .

It is a cyclic number.

It is not a de Polignac number, because 312103030112221 - 2¹⁵ = 312103030079453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312103030112192 and 312103030112201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312103030112261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156051515056110 + 156051515056111.

It is an arithmetic number, because the mean of its divisors is an integer number (156051515056111).

Almost surely, 2^{312103030112221} is an apocalyptic number.

It is an amenable number.

312103030112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

312103030112221 is an equidigital number, since it uses as much as digits as its factorization.

312103030112221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 312103030112221 its reverse (122211030301213), we get a palindrome (434314060413434).

The spelling of 312103030112221 in words is "three hundred twelve trillion, one hundred three billion, thirty million, one hundred twelve thousand, two hundred twenty-one".