12212010221 has 4 divisors (see below), whose sum is σ = 12217233600. Its totient is φ = 12206786844.

The previous prime is 12212010193. The next prime is 12212010227. The reversal of 12212010221 is 12201021221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12201021221 = 73 ⋅167137277.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12212010221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212010196 and 12212010205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212010227) 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, 2608181 + ... + 2612858.

It is an arithmetic number, because the mean of its divisors is an integer number (3054308400).

Almost surely, 2^12212010221 is an apocalyptic number.

It is an amenable number.

12212010221 is a deficient number, since it is larger than the sum of its proper divisors (5223379).

12212010221 is an equidigital number, since it uses as much as digits as its factorization.

12212010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5223378.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12212010221 its reverse (12201021221), we get a palindrome (24413031442).

The spelling of 12212010221 in words is "twelve billion, two hundred twelve million, ten thousand, two hundred twenty-one".