12212111005 has 8 divisors (see below), whose sum is σ = 14655177432. Its totient is φ = 9769259328.

The previous prime is 12212110997. The next prime is 12212111039. The reversal of 12212111005 is 50011121221.

It can be written as a sum of positive squares in 4 ways, for example, as 5661960516 + 6550150489 = 75246^2 + 80933^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12212111005 - 2³ = 12212110997 is a prime.

It is a super-2 number, since 2×12212111005² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12212111005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126259 + ... + 200911.

It is an arithmetic number, because the mean of its divisors is an integer number (1831897179).

Almost surely, 2^12212111005 is an apocalyptic number.

It is an amenable number.

12212111005 is a deficient number, since it is larger than the sum of its proper divisors (2443066427).

12212111005 is an equidigital number, since it uses as much as digits as its factorization.

12212111005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107375.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 12212111005 its reverse (50011121221), we get a palindrome (62223232226).

The spelling of 12212111005 in words is "twelve billion, two hundred twelve million, one hundred eleven thousand, five".