102002121121 has 4 divisors (see below), whose sum is σ = 102015892144. Its totient is φ = 101988350100.

The previous prime is 102002121101. The next prime is 102002121139. The reversal of 102002121121 is 121121200201.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121121200201 = 13037 ⋅9290573.

It is a cyclic number.

It is not a de Polignac number, because 102002121121 - 2¹³ = 102002112929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102002121101) 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, 6874395 + ... + 6889216.

It is an arithmetic number, because the mean of its divisors is an integer number (25503973036).

Almost surely, 2^102002121121 is an apocalyptic number.

It is an amenable number.

102002121121 is a deficient number, since it is larger than the sum of its proper divisors (13771023).

102002121121 is an equidigital number, since it uses as much as digits as its factorization.

102002121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13771022.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102002121121 its reverse (121121200201), we get a palindrome (223123321322).

The spelling of 102002121121 in words is "one hundred two billion, two million, one hundred twenty-one thousand, one hundred twenty-one".