212313310109 has 4 divisors (see below), whose sum is σ = 221544323616. Its totient is φ = 203082296604.

The previous prime is 212313310103. The next prime is 212313310133. The reversal of 212313310109 is 901013313212.

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 a de Polignac number, because none of the positive numbers 2^k-212313310109 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 (212313310103) 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, 4615506719 + ... + 4615506764.

It is an arithmetic number, because the mean of its divisors is an integer number (55386080904).

Almost surely, 2^212313310109 is an apocalyptic number.

It is an amenable number.

212313310109 is a deficient number, since it is larger than the sum of its proper divisors (9231013507).

212313310109 is an equidigital number, since it uses as much as digits as its factorization.

212313310109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9231013506.

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 212313310109 in words is "two hundred twelve billion, three hundred thirteen million, three hundred ten thousand, one hundred nine".