12211123312123 has 2 divisors, whose sum is σ = 12211123312124. Its totient is φ = 12211123312122.

The previous prime is 12211123312121. The next prime is 12211123312133. The reversal of 12211123312123 is 32121332111221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12211123312123 - 2¹ = 12211123312121 is a prime.

It is a super-2 number, since 2×12211123312123² (a number of 27 digits) contains 22 as substring.

Together with 12211123312121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12211123312121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105561656061 + 6105561656062.

It is an arithmetic number, because the mean of its divisors is an integer number (6105561656062).

Almost surely, 2^{12211123312123} is an apocalyptic number.

12211123312123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211123312123 is an equidigital number, since it uses as much as digits as its factorization.

12211123312123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

Adding to 12211123312123 its reverse (32121332111221), we get a palindrome (44332455423344).

The spelling of 12211123312123 in words is "twelve trillion, two hundred eleven billion, one hundred twenty-three million, three hundred twelve thousand, one hundred twenty-three".