10121208409 has 8 divisors (see below), whose sum is σ = 10912063680. Its totient is φ = 9332110416.

The previous prime is 10121208403. The next prime is 10121208421. The reversal of 10121208409 is 90480212101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10121208409 - 2⁹ = 10121207897 is a prime.

It is a super-2 number, since 2×10121208409² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10121208403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427339 + ... + 450400.

It is an arithmetic number, because the mean of its divisors is an integer number (1364007960).

Almost surely, 2^10121208409 is an apocalyptic number.

It is an amenable number.

10121208409 is a deficient number, since it is larger than the sum of its proper divisors (790855271).

10121208409 is an equidigital number, since it uses as much as digits as its factorization.

10121208409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878639.

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 10121208409 in words is "ten billion, one hundred twenty-one million, two hundred eight thousand, four hundred nine".