102212012009 has 2 divisors, whose sum is σ = 102212012010. Its totient is φ = 102212012008.

The previous prime is 102212012003. The next prime is 102212012017. The reversal of 102212012009 is 900210212201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102146077609 + 65934400 = 319603^2 + 8120^2 .

It is a cyclic number.

It is not a de Polignac number, because 102212012009 - 2³² = 97917044713 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (102212012003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51106006004 + 51106006005.

It is an arithmetic number, because the mean of its divisors is an integer number (51106006005).

Almost surely, 2^102212012009 is an apocalyptic number.

It is an amenable number.

102212012009 is a deficient number, since it is larger than the sum of its proper divisors (1).

102212012009 is an equidigital number, since it uses as much as digits as its factorization.

102212012009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 102212012009 in words is "one hundred two billion, two hundred twelve million, twelve thousand, nine".