212130111002309 has 4 divisors (see below), whose sum is σ = 212130178831116. Its totient is φ = 212130043173504.

The previous prime is 212130111002291. The next prime is 212130111002321. The reversal of 212130111002309 is 903200111031212.

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 121920861401284 + 90209249601025 = 11041778^2 + 9497855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212130111002309 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 (212130111002389) 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, 28984364 + ... + 35557749.

It is an arithmetic number, because the mean of its divisors is an integer number (53032544707779).

Almost surely, 2^{212130111002309} is an apocalyptic number.

It is an amenable number.

212130111002309 is a deficient number, since it is larger than the sum of its proper divisors (67828807).

212130111002309 is an equidigital number, since it uses as much as digits as its factorization.

212130111002309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67828806.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 212130111002309 in words is "two hundred twelve trillion, one hundred thirty billion, one hundred eleven million, two thousand, three hundred nine".