10001210212909 has 2 divisors, whose sum is σ = 10001210212910. Its totient is φ = 10001210212908.

The previous prime is 10001210212901. The next prime is 10001210212957. The reversal of 10001210212909 is 90921201210001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9953690572809 + 47519640100 = 3154947^2 + 217990^2 .

It is a cyclic number.

It is not a de Polignac number, because 10001210212909 - 2³ = 10001210212901 is a prime.

It is a super-2 number, since 2×10001210212909² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10001210212901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000605106454 + 5000605106455.

It is an arithmetic number, because the mean of its divisors is an integer number (5000605106455).

Almost surely, 2^{10001210212909} is an apocalyptic number.

It is an amenable number.

10001210212909 is a deficient number, since it is larger than the sum of its proper divisors (1).

10001210212909 is an equidigital number, since it uses as much as digits as its factorization.

10001210212909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 10001210212909 in words is "ten trillion, one billion, two hundred ten million, two hundred twelve thousand, nine hundred nine".