212440311309 has 16 divisors (see below), whose sum is σ = 286695847872. Its totient is φ = 139906174848.

The previous prime is 212440311299. The next prime is 212440311311. The reversal of 212440311309 is 903113044212.

It is not a de Polignac number, because 212440311309 - 2⁸ = 212440311053 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212440311389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2744907 + ... + 2821239.

It is an arithmetic number, because the mean of its divisors is an integer number (17918490492).

Almost surely, 2^212440311309 is an apocalyptic number.

It is an amenable number.

212440311309 is a deficient number, since it is larger than the sum of its proper divisors (74255536563).

212440311309 is a wasteful number, since it uses less digits than its factorization.

212440311309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87596.

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 212440311309 in words is "two hundred twelve billion, four hundred forty million, three hundred eleven thousand, three hundred nine".