102120002121 has 4 divisors (see below), whose sum is σ = 136160002832. Its totient is φ = 68080001412.

The previous prime is 102120002081. The next prime is 102120002123. The reversal of 102120002121 is 121200021201.

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 not a de Polignac number, because 102120002121 - 2⁶ = 102120002057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102120002097 and 102120002106.

It is not an unprimeable number, because it can be changed into a prime (102120002123) 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, 17020000351 + ... + 17020000356.

It is an arithmetic number, because the mean of its divisors is an integer number (34040000708).

Almost surely, 2^102120002121 is an apocalyptic number.

It is an amenable number.

102120002121 is a deficient number, since it is larger than the sum of its proper divisors (34040000711).

102120002121 is an equidigital number, since it uses as much as digits as its factorization.

102120002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34040000710.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102120002121 its reverse (121200021201), we get a palindrome (223320023322).

The spelling of 102120002121 in words is "one hundred two billion, one hundred twenty million, two thousand, one hundred twenty-one".