21112012222127 has 2 divisors, whose sum is σ = 21112012222128. Its totient is φ = 21112012222126.

The previous prime is 21112012222123. The next prime is 21112012222141. The reversal of 21112012222127 is 72122221021112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21112012222127 - 2² = 21112012222123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21112012222096 and 21112012222105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112012222123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556006111063 + 10556006111064.

It is an arithmetic number, because the mean of its divisors is an integer number (10556006111064).

Almost surely, 2^{21112012222127} is an apocalyptic number.

21112012222127 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112012222127 is an equidigital number, since it uses as much as digits as its factorization.

21112012222127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 26.

Adding to 21112012222127 its reverse (72122221021112), we get a palindrome (93234233243239).

The spelling of 21112012222127 in words is "twenty-one trillion, one hundred twelve billion, twelve million, two hundred twenty-two thousand, one hundred twenty-seven".