21103121210299 has 2 divisors, whose sum is σ = 21103121210300. Its totient is φ = 21103121210298.

The previous prime is 21103121210287. The next prime is 21103121210329. The reversal of 21103121210299 is 99201212130112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21103121210299 is a prime.

It is not a weakly prime, because it can be changed into another prime (21103121220299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551560605149 + 10551560605150.

It is an arithmetic number, because the mean of its divisors is an integer number (10551560605150).

Almost surely, 2^{21103121210299} is an apocalyptic number.

21103121210299 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103121210299 is an equidigital number, since it uses as much as digits as its factorization.

21103121210299 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 21103121210299 in words is "twenty-one trillion, one hundred three billion, one hundred twenty-one million, two hundred ten thousand, two hundred ninety-nine".