10212001012109 has 4 divisors (see below), whose sum is σ = 10997539551516. Its totient is φ = 9426462472704.

The previous prime is 10212001012099. The next prime is 10212001012123. The reversal of 10212001012109 is 90121010021201.

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 2443500448900 + 7768500563209 = 1563170^2 + 2787203^2 .

It is a cyclic number.

It is not a de Polignac number, because 10212001012109 - 2⁸ = 10212001011853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212001012309) 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, 392769269684 + ... + 392769269709.

It is an arithmetic number, because the mean of its divisors is an integer number (2749384887879).

Almost surely, 2^{10212001012109} is an apocalyptic number.

It is an amenable number.

10212001012109 is a deficient number, since it is larger than the sum of its proper divisors (785538539407).

10212001012109 is an equidigital number, since it uses as much as digits as its factorization.

10212001012109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785538539406.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 10212001012109 in words is "ten trillion, two hundred twelve billion, one million, twelve thousand, one hundred nine".