21112012221199 has 2 divisors, whose sum is σ = 21112012221200. Its totient is φ = 21112012221198.

The previous prime is 21112012221197. The next prime is 21112012221203. The reversal of 21112012221199 is 99112221021112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21112012221199 - 2¹ = 21112012221197 is a prime.

Together with 21112012221197, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112012221193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556006110599 + 10556006110600.

It is an arithmetic number, because the mean of its divisors is an integer number (10556006110600).

Almost surely, 2^{21112012221199} is an apocalyptic number.

21112012221199 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112012221199 is an equidigital number, since it uses as much as digits as its factorization.

21112012221199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 21112012221199 in words is "twenty-one trillion, one hundred twelve billion, twelve million, two hundred twenty-one thousand, one hundred ninety-nine".