212303120312111 has 2 divisors, whose sum is σ = 212303120312112. Its totient is φ = 212303120312110.

The previous prime is 212303120312081. The next prime is 212303120312123. The reversal of 212303120312111 is 111213021303212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212303120312111 is a prime.

It is a super-2 number, since 2×212303120312111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212303120312411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106151560156055 + 106151560156056.

It is an arithmetic number, because the mean of its divisors is an integer number (106151560156056).

Almost surely, 2^{212303120312111} is an apocalyptic number.

212303120312111 is a deficient number, since it is larger than the sum of its proper divisors (1).

212303120312111 is an equidigital number, since it uses as much as digits as its factorization.

212303120312111 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 23.

Adding to 212303120312111 its reverse (111213021303212), we get a palindrome (323516141615323).

The spelling of 212303120312111 in words is "two hundred twelve trillion, three hundred three billion, one hundred twenty million, three hundred twelve thousand, one hundred eleven".