102020002121 has 8 divisors (see below), whose sum is σ = 104218775040. Its totient is φ = 99822401568.

The previous prime is 102020002093. The next prime is 102020002157. The reversal of 102020002121 is 121200020201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102020002121 - 2²⁶ = 101952893257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102020092121) 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 7 ways as a sum of consecutive naturals, for example, 116036 + ... + 466373.

It is an arithmetic number, because the mean of its divisors is an integer number (13027346880).

Almost surely, 2^102020002121 is an apocalyptic number.

It is an amenable number.

102020002121 is a deficient number, since it is larger than the sum of its proper divisors (2198772919).

102020002121 is an equidigital number, since it uses as much as digits as its factorization.

102020002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586183.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 102020002121 its reverse (121200020201), we get a palindrome (223220022322).

The spelling of 102020002121 in words is "one hundred two billion, twenty million, two thousand, one hundred twenty-one".