102221201209 has 4 divisors (see below), whose sum is σ = 102227442660. Its totient is φ = 102214959760.

The previous prime is 102221201153. The next prime is 102221201239. The reversal of 102221201209 is 902102122201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56099343609 + 46121857600 = 236853^2 + 214760^2 .

It is a cyclic number.

It is not a de Polignac number, because 102221201209 - 2²³ = 102212812601 is a prime.

It is a super-2 number, since 2×102221201209² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102221201209.

It is not an unprimeable number, because it can be changed into a prime (102221201239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3096094 + ... + 3128935.

It is an arithmetic number, because the mean of its divisors is an integer number (25556860665).

Almost surely, 2^102221201209 is an apocalyptic number.

It is an amenable number.

102221201209 is a deficient number, since it is larger than the sum of its proper divisors (6241451).

102221201209 is an equidigital number, since it uses as much as digits as its factorization.

102221201209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6241450.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 102221201209 in words is "one hundred two billion, two hundred twenty-one million, two hundred one thousand, two hundred nine".