12211017646 has 8 divisors (see below), whose sum is σ = 18948130920. Its totient is φ = 5894974008.

The previous prime is 12211017619. The next prime is 12211017647. The reversal of 12211017646 is 64671011221.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211017647) 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, 105267336 + ... + 105267451.

It is an arithmetic number, because the mean of its divisors is an integer number (2368516365).

Almost surely, 2^12211017646 is an apocalyptic number.

12211017646 is a deficient number, since it is larger than the sum of its proper divisors (6737113274).

12211017646 is a wasteful number, since it uses less digits than its factorization.

12211017646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210534818.

The product of its (nonzero) digits is 4032, while the sum is 31.

Adding to 12211017646 its reverse (64671011221), we get a palindrome (76882028867).

The spelling of 12211017646 in words is "twelve billion, two hundred eleven million, seventeen thousand, six hundred forty-six".