312244012121 has 2 divisors, whose sum is σ = 312244012122. Its totient is φ = 312244012120.

The previous prime is 312244012109. The next prime is 312244012139. The reversal of 312244012121 is 121210442213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 310849736521 + 1394275600 = 557539^2 + 37340^2 .

It is a cyclic number.

It is not a de Polignac number, because 312244012121 - 2⁶ = 312244012057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (312244012721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156122006060 + 156122006061.

It is an arithmetic number, because the mean of its divisors is an integer number (156122006061).

Almost surely, 2^312244012121 is an apocalyptic number.

It is an amenable number.

312244012121 is a deficient number, since it is larger than the sum of its proper divisors (1).

312244012121 is an equidigital number, since it uses as much as digits as its factorization.

312244012121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 312244012121 its reverse (121210442213), we get a palindrome (433454454334).

The spelling of 312244012121 in words is "three hundred twelve billion, two hundred forty-four million, twelve thousand, one hundred twenty-one".