102121120099 has 4 divisors (see below), whose sum is σ = 103132220400. Its totient is φ = 101110019800.

The previous prime is 102121120097. The next prime is 102121120109. The reversal of 102121120099 is 990021121201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102121120099 - 2¹ = 102121120097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102121120091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505549999 + ... + 505550200.

It is an arithmetic number, because the mean of its divisors is an integer number (25783055100).

Almost surely, 2^102121120099 is an apocalyptic number.

102121120099 is a deficient number, since it is larger than the sum of its proper divisors (1011100301).

102121120099 is a wasteful number, since it uses less digits than its factorization.

102121120099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011100300.

The product of its (nonzero) digits is 648, while the sum is 28.

It can be divided in two parts, 10212 and 1120099, that added together give a palindrome (1130311).

The spelling of 102121120099 in words is "one hundred two billion, one hundred twenty-one million, one hundred twenty thousand, ninety-nine".