21112100121199 has 2 divisors, whose sum is σ = 21112100121200. Its totient is φ = 21112100121198.

The previous prime is 21112100121197. The next prime is 21112100121227. The reversal of 21112100121199 is 99112100121112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21112100121199 - 2¹ = 21112100121197 is a prime.

Together with 21112100121197, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21112100121199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112100121197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556050060599 + 10556050060600.

It is an arithmetic number, because the mean of its divisors is an integer number (10556050060600).

Almost surely, 2^{21112100121199} is an apocalyptic number.

21112100121199 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112100121199 is an equidigital number, since it uses as much as digits as its factorization.

21112100121199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 31.

The spelling of 21112100121199 in words is "twenty-one trillion, one hundred twelve billion, one hundred million, one hundred twenty-one thousand, one hundred ninety-nine".