312120122011 has 2 divisors, whose sum is σ = 312120122012. Its totient is φ = 312120122010.

The previous prime is 312120121993. The next prime is 312120122033. The reversal of 312120122011 is 110221021213.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312120122011 is a prime.

It is not a weakly prime, because it can be changed into another prime (312120122311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156060061005 + 156060061006.

It is an arithmetic number, because the mean of its divisors is an integer number (156060061006).

Almost surely, 2^312120122011 is an apocalyptic number.

312120122011 is a deficient number, since it is larger than the sum of its proper divisors (1).

312120122011 is an equidigital number, since it uses as much as digits as its factorization.

312120122011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 312120122011 its reverse (110221021213), we get a palindrome (422341143224).

The spelling of 312120122011 in words is "three hundred twelve billion, one hundred twenty million, one hundred twenty-two thousand, eleven".