10212112021009 has 4 divisors (see below), whose sum is σ = 10286652984804. Its totient is φ = 10137571057216.

The previous prime is 10212112020967. The next prime is 10212112021031. The reversal of 10212112021009 is 90012021121201.

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 8319024969984 + 1893087051025 = 2884272^2 + 1375895^2 .

It is a cyclic number.

It is not a de Polignac number, because 10212112021009 - 2¹¹ = 10212112018961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10212112121009) 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, 37270481692 + ... + 37270481965.

It is an arithmetic number, because the mean of its divisors is an integer number (2571663246201).

Almost surely, 2^{10212112021009} is an apocalyptic number.

It is an amenable number.

10212112021009 is a deficient number, since it is larger than the sum of its proper divisors (74540963795).

10212112021009 is an equidigital number, since it uses as much as digits as its factorization.

10212112021009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74540963794.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 10212112021009 in words is "ten trillion, two hundred twelve billion, one hundred twelve million, twenty-one thousand, nine".