212311312220123 has 2 divisors, whose sum is σ = 212311312220124. Its totient is φ = 212311312220122.

The previous prime is 212311312220107. The next prime is 212311312220143. The reversal of 212311312220123 is 321022213113212.

212311312220123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212311312220123 - 2⁴ = 212311312220107 is a prime.

It is a super-2 number, since 2×212311312220123² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212311312220092 and 212311312220101.

It is not a weakly prime, because it can be changed into another prime (212311312220143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106155656110061 + 106155656110062.

It is an arithmetic number, because the mean of its divisors is an integer number (106155656110062).

Almost surely, 2^{212311312220123} is an apocalyptic number.

212311312220123 is a deficient number, since it is larger than the sum of its proper divisors (1).

212311312220123 is an equidigital number, since it uses as much as digits as its factorization.

212311312220123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 212311312220123 its reverse (321022213113212), we get a palindrome (533333525333335).

The spelling of 212311312220123 in words is "two hundred twelve trillion, three hundred eleven billion, three hundred twelve million, two hundred twenty thousand, one hundred twenty-three".