12221111021211 has 12 divisors (see below), whose sum is σ = 18222158368960. Its totient is φ = 7884587755440.

The previous prime is 12221111021137. The next prime is 12221111021221. The reversal of 12221111021211 is 11212011112221.

It is a happy number.

12221111021211 is a `hidden beast` number, since 122 + 211 + 110 + 212 + 11 = 666.

It is not a de Polignac number, because 12221111021211 - 2³¹ = 12218963537563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221111021221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21901632376 + ... + 21901632933.

Almost surely, 2^{12221111021211} is an apocalyptic number.

12221111021211 is a deficient number, since it is larger than the sum of its proper divisors (6001047347749).

12221111021211 is a wasteful number, since it uses less digits than its factorization.

12221111021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43803265346 (or 43803265343 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12221111021211 its reverse (11212011112221), we get a palindrome (23433122133432).

The spelling of 12221111021211 in words is "twelve trillion, two hundred twenty-one billion, one hundred eleven million, twenty-one thousand, two hundred eleven".