102020201122121 has 4 divisors (see below), whose sum is σ = 102021040425744. Its totient is φ = 102019361818500.

The previous prime is 102020201122043. The next prime is 102020201122163. The reversal of 102020201122121 is 121221102020201.

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-102020201122121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 102020201122121.

It is not an unprimeable number, because it can be changed into a prime (102020201322121) 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, 419469455 + ... + 419712596.

It is an arithmetic number, because the mean of its divisors is an integer number (25505260106436).

Almost surely, 2^{102020201122121} is an apocalyptic number.

It is an amenable number.

102020201122121 is a deficient number, since it is larger than the sum of its proper divisors (839303623).

102020201122121 is an equidigital number, since it uses as much as digits as its factorization.

102020201122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839303622.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 102020201122121 its reverse (121221102020201), we get a palindrome (223241303142322).

The spelling of 102020201122121 in words is "one hundred two trillion, twenty billion, two hundred one million, one hundred twenty-two thousand, one hundred twenty-one".