21121022122099 has 2 divisors, whose sum is σ = 21121022122100. Its totient is φ = 21121022122098.

The previous prime is 21121022122003. The next prime is 21121022122199. The reversal of 21121022122099 is 99022122012112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21121022122099 - 2⁷ = 21121022121971 is a prime.

It is not a weakly prime, because it can be changed into another prime (21121022122199) 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, 10560511061049 + 10560511061050.

It is an arithmetic number, because the mean of its divisors is an integer number (10560511061050).

Almost surely, 2^{21121022122099} is an apocalyptic number.

21121022122099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121022122099 is an equidigital number, since it uses as much as digits as its factorization.

21121022122099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 21121022122099 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-two million, one hundred twenty-two thousand, ninety-nine".