12212260605 has 12 divisors (see below), whose sum is σ = 21167918460. Its totient is φ = 6513205632.

The previous prime is 12212260531. The next prime is 12212260661. The reversal of 12212260605 is 50606221221.

12212260605 is a `hidden beast` number, since 1 + 22 + 12 + 26 + 0 + 605 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6530417721 + 5681842884 = 80811^2 + 75378^2 .

It is not a de Polignac number, because 12212260605 - 2¹⁵ = 12212227837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135691740 + ... + 135691829.

It is an arithmetic number, because the mean of its divisors is an integer number (1763993205).

Almost surely, 2^12212260605 is an apocalyptic number.

12212260605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12212260605 is a deficient number, since it is larger than the sum of its proper divisors (8955657855).

12212260605 is a wasteful number, since it uses less digits than its factorization.

12212260605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271383580 (or 271383577 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 12212260605 its reverse (50606221221), we get a palindrome (62818481826).

The spelling of 12212260605 in words is "twelve billion, two hundred twelve million, two hundred sixty thousand, six hundred five".