102002002120121 has 4 divisors (see below), whose sum is σ = 103293166704000. Its totient is φ = 100710837536244.

The previous prime is 102002002120111. The next prime is 102002002120129. The reversal of 102002002120121 is 121021200200201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102002002120121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102002002120096 and 102002002120105.

It is not an unprimeable number, because it can be changed into a prime (102002002120129) 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 in 3 ways as a sum of consecutive naturals, for example, 645582291821 + ... + 645582291978.

It is an arithmetic number, because the mean of its divisors is an integer number (25823291676000).

Almost surely, 2^{102002002120121} is an apocalyptic number.

It is an amenable number.

102002002120121 is a deficient number, since it is larger than the sum of its proper divisors (1291164583879).

102002002120121 is an equidigital number, since it uses as much as digits as its factorization.

102002002120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291164583878.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102002002120121 its reverse (121021200200201), we get a palindrome (223023202320322).

The spelling of 102002002120121 in words is "one hundred two trillion, two billion, two million, one hundred twenty thousand, one hundred twenty-one".