10211202109 has 2 divisors, whose sum is σ = 10211202110. Its totient is φ = 10211202108.

The previous prime is 10211202083. The next prime is 10211202161. The reversal of 10211202109 is 90120211201.

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., 6242580100 + 3968622009 = 79010^2 + 62997^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211202109 - 2⁷ = 10211201981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10211202409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105601054 + 5105601055.

It is an arithmetic number, because the mean of its divisors is an integer number (5105601055).

Almost surely, 2^10211202109 is an apocalyptic number.

It is an amenable number.

10211202109 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211202109 is an equidigital number, since it uses as much as digits as its factorization.

10211202109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 10211202109 in words is "ten billion, two hundred eleven million, two hundred two thousand, one hundred nine".