312221344121123 has 2 divisors, whose sum is σ = 312221344121124. Its totient is φ = 312221344121122.

The previous prime is 312221344121119. The next prime is 312221344121231. The reversal of 312221344121123 is 321121443122213.

Together with next prime (312221344121231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312221344121123 - 2² = 312221344121119 is a prime.

It is a super-2 number, since 2×312221344121123² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 312221344121123.

It is not a weakly prime, because it can be changed into another prime (312221344121923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156110672060561 + 156110672060562.

It is an arithmetic number, because the mean of its divisors is an integer number (156110672060562).

Almost surely, 2^{312221344121123} is an apocalyptic number.

312221344121123 is a deficient number, since it is larger than the sum of its proper divisors (1).

312221344121123 is an equidigital number, since it uses as much as digits as its factorization.

312221344121123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 32.

Adding to 312221344121123 its reverse (321121443122213), we get a palindrome (633342787243336).

The spelling of 312221344121123 in words is "three hundred twelve trillion, two hundred twenty-one billion, three hundred forty-four million, one hundred twenty-one thousand, one hundred twenty-three".