12211111051 has 2 divisors, whose sum is σ = 12211111052. Its totient is φ = 12211111050.

The previous prime is 12211111049. The next prime is 12211111091. The reversal of 12211111051 is 15011111221.

It is a weak prime.

It is an emirp because it is prime and its reverse (15011111221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12211111051 - 2¹ = 12211111049 is a prime.

It is a super-2 number, since 2×12211111051² (a number of 21 digits) contains 22 as substring.

Together with 12211111049, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12211111021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105555525 + 6105555526.

It is an arithmetic number, because the mean of its divisors is an integer number (6105555526).

Almost surely, 2^12211111051 is an apocalyptic number.

12211111051 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211111051 is an equidigital number, since it uses as much as digits as its factorization.

12211111051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20, while the sum is 16.

Adding to 12211111051 its reverse (15011111221), we get a palindrome (27222222272).

The spelling of 12211111051 in words is "twelve billion, two hundred eleven million, one hundred eleven thousand, fifty-one".