102320002121 has 2 divisors, whose sum is σ = 102320002122. Its totient is φ = 102320002120.

The previous prime is 102320002117. The next prime is 102320002123. The reversal of 102320002121 is 121200023201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81916736521 + 20403265600 = 286211^2 + 142840^2 .

It is a cyclic number.

It is not a de Polignac number, because 102320002121 - 2² = 102320002117 is a prime.

It is a super-4 number, since 4×102320002121⁴ (a number of 45 digits) contains 4444 as substring.

Together with 102320002123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 102320002096 and 102320002105.

It is not a weakly prime, because it can be changed into another prime (102320002123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51160001060 + 51160001061.

It is an arithmetic number, because the mean of its divisors is an integer number (51160001061).

Almost surely, 2^102320002121 is an apocalyptic number.

It is an amenable number.

102320002121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102320002121 is an equidigital number, since it uses as much as digits as its factorization.

102320002121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 102320002121 its reverse (121200023201), we get a palindrome (223520025322).

The spelling of 102320002121 in words is "one hundred two billion, three hundred twenty million, two thousand, one hundred twenty-one".