102012303209 has 2 divisors, whose sum is σ = 102012303210. Its totient is φ = 102012303208.

The previous prime is 102012303199. The next prime is 102012303221. The reversal of 102012303209 is 902303210201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85964480809 + 16047822400 = 293197^2 + 126680^2 .

It is a cyclic number.

It is not a de Polignac number, because 102012303209 - 2¹⁶ = 102012237673 is a prime.

It is not a weakly prime, because it can be changed into another prime (102012303409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51006151604 + 51006151605.

It is an arithmetic number, because the mean of its divisors is an integer number (51006151605).

Almost surely, 2^102012303209 is an apocalyptic number.

It is an amenable number.

102012303209 is a deficient number, since it is larger than the sum of its proper divisors (1).

102012303209 is an equidigital number, since it uses as much as digits as its factorization.

102012303209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The spelling of 102012303209 in words is "one hundred two billion, twelve million, three hundred three thousand, two hundred nine".