10121312321209 has 4 divisors (see below), whose sum is σ = 10121409089104. Its totient is φ = 10121215553316.

The previous prime is 10121312321191. The next prime is 10121312321279. The reversal of 10121312321209 is 90212321312101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10121312321209 - 2⁹ = 10121312320697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10121312321279) 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, 48226887 + ... + 48436300.

It is an arithmetic number, because the mean of its divisors is an integer number (2530352272276).

Almost surely, 2^{10121312321209} is an apocalyptic number.

It is an amenable number.

10121312321209 is a deficient number, since it is larger than the sum of its proper divisors (96767895).

10121312321209 is an equidigital number, since it uses as much as digits as its factorization.

10121312321209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96767894.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 10121312321209 in words is "ten trillion, one hundred twenty-one billion, three hundred twelve million, three hundred twenty-one thousand, two hundred nine".