101221012099 has 2 divisors, whose sum is σ = 101221012100. Its totient is φ = 101221012098.

The previous prime is 101221012051. The next prime is 101221012153. The reversal of 101221012099 is 990210122101.

It is a weak prime.

It is an emirp because it is prime and its reverse (990210122101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101221012099 - 2⁹ = 101221011587 is a prime.

It is a super-3 number, since 3×101221012099³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (101221012019) 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, 50610506049 + 50610506050.

It is an arithmetic number, because the mean of its divisors is an integer number (50610506050).

Almost surely, 2^101221012099 is an apocalyptic number.

101221012099 is a deficient number, since it is larger than the sum of its proper divisors (1).

101221012099 is an equidigital number, since it uses as much as digits as its factorization.

101221012099 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 101221012099 in words is "one hundred one billion, two hundred twenty-one million, twelve thousand, ninety-nine".