12212517101 has 4 divisors (see below), whose sum is σ = 12265847100. Its totient is φ = 12159187104.

The previous prime is 12212517067. The next prime is 12212517113. The reversal of 12212517101 is 10171521221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10171521221 = 859 ⋅11841119.

It can be written as a sum of positive squares in 2 ways, for example, as 6773454601 + 5439062500 = 82301^2 + 73750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12212517101 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 (12212517151) 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, 26664656 + ... + 26665113.

It is an arithmetic number, because the mean of its divisors is an integer number (3066461775).

Almost surely, 2^12212517101 is an apocalyptic number.

It is an amenable number.

12212517101 is a deficient number, since it is larger than the sum of its proper divisors (53329999).

12212517101 is an equidigital number, since it uses as much as digits as its factorization.

12212517101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53329998.

The product of its (nonzero) digits is 280, while the sum is 23.

The spelling of 12212517101 in words is "twelve billion, two hundred twelve million, five hundred seventeen thousand, one hundred one".