102130021243 has 2 divisors, whose sum is σ = 102130021244. Its totient is φ = 102130021242.

The previous prime is 102130021193. The next prime is 102130021247. The reversal of 102130021243 is 342120031201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102130021243 - 2²¹ = 102127924091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102130021243.

It is not a weakly prime, because it can be changed into another prime (102130021247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51065010621 + 51065010622.

It is an arithmetic number, because the mean of its divisors is an integer number (51065010622).

Almost surely, 2^102130021243 is an apocalyptic number.

102130021243 is a deficient number, since it is larger than the sum of its proper divisors (1).

102130021243 is an equidigital number, since it uses as much as digits as its factorization.

102130021243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 102130021243 its reverse (342120031201), we get a palindrome (444250052444).

The spelling of 102130021243 in words is "one hundred two billion, one hundred thirty million, twenty-one thousand, two hundred forty-three".