12220210011221 has 24 divisors (see below), whose sum is σ = 13673247776640. Its totient is φ = 10882189316736.

The previous prime is 12220210011203. The next prime is 12220210011299. The reversal of 12220210011221 is 12211001202221.

It is not a de Polignac number, because 12220210011221 - 2⁴² = 7822163500117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 12220210011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220210010221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3564740 + ... + 6094898.

It is an arithmetic number, because the mean of its divisors is an integer number (569718657360).

Almost surely, 2^{12220210011221} is an apocalyptic number.

It is an amenable number.

12220210011221 is a deficient number, since it is larger than the sum of its proper divisors (1453037765419).

12220210011221 is a wasteful number, since it uses less digits than its factorization.

12220210011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2531001 (or 2530982 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12220210011221 its reverse (12211001202221), we get a palindrome (24431211213442).

The spelling of 12220210011221 in words is "twelve trillion, two hundred twenty billion, two hundred ten million, eleven thousand, two hundred twenty-one".