12311012021111 has 2 divisors, whose sum is σ = 12311012021112. Its totient is φ = 12311012021110.

The previous prime is 12311012021101. The next prime is 12311012021137. The reversal of 12311012021111 is 11112021011321.

It is a weak prime.

It is an emirp because it is prime and its reverse (11112021011321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12311012021111 - 2¹⁴ = 12311012004727 is a prime.

It is a super-2 number, since 2×12311012021111² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12311012021111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12311012021101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155506010555 + 6155506010556.

It is an arithmetic number, because the mean of its divisors is an integer number (6155506010556).

Almost surely, 2^{12311012021111} is an apocalyptic number.

12311012021111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311012021111 is an equidigital number, since it uses as much as digits as its factorization.

12311012021111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 12311012021111 its reverse (11112021011321), we get a palindrome (23423033032432).

The spelling of 12311012021111 in words is "twelve trillion, three hundred eleven billion, twelve million, twenty-one thousand, one hundred eleven".