102011222009 has 2 divisors, whose sum is σ = 102011222010. Its totient is φ = 102011222008.

The previous prime is 102011221997. The next prime is 102011222111. The reversal of 102011222009 is 900222110201.

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., 100000147984 + 2011074025 = 316228^2 + 44845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102011222009 is a prime.

It is not a weakly prime, because it can be changed into another prime (102011222609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51005611004 + 51005611005.

It is an arithmetic number, because the mean of its divisors is an integer number (51005611005).

Almost surely, 2^102011222009 is an apocalyptic number.

It is an amenable number.

102011222009 is a deficient number, since it is larger than the sum of its proper divisors (1).

102011222009 is an equidigital number, since it uses as much as digits as its factorization.

102011222009 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 102011222009 in words is "one hundred two billion, eleven million, two hundred twenty-two thousand, nine".