1212021100099 has 2 divisors, whose sum is σ = 1212021100100. Its totient is φ = 1212021100098.

The previous prime is 1212021100097. The next prime is 1212021100111. The reversal of 1212021100099 is 9900011202121.

It is a weak prime.

It is an emirp because it is prime and its reverse (9900011202121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212021100099 - 2¹ = 1212021100097 is a prime.

Together with 1212021100097, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1212021100097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606010550049 + 606010550050.

It is an arithmetic number, because the mean of its divisors is an integer number (606010550050).

Almost surely, 2^{1212021100099} is an apocalyptic number.

1212021100099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212021100099 is an equidigital number, since it uses as much as digits as its factorization.

1212021100099 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 28.

The spelling of 1212021100099 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred thousand, ninety-nine".