12211212130021 has 32 divisors (see below), whose sum is σ = 12891832289280. Its totient is φ = 11555365067136.

The previous prime is 12211212129973. The next prime is 12211212130037. The reversal of 12211212130021 is 12003121211221.

It is a cyclic number.

It is not a de Polignac number, because 12211212130021 - 2¹⁷ = 12211211998949 is a prime.

It is a super-2 number, since 2×12211212130021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211212130321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119412505 + ... + 119514721.

It is an arithmetic number, because the mean of its divisors is an integer number (402869759040).

Almost surely, 2^{12211212130021} is an apocalyptic number.

It is an amenable number.

12211212130021 is a deficient number, since it is larger than the sum of its proper divisors (680620159259).

12211212130021 is a wasteful number, since it uses less digits than its factorization.

12211212130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103033.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 12211212130021 its reverse (12003121211221), we get a palindrome (24214333341242).

The spelling of 12211212130021 in words is "twelve trillion, two hundred eleven billion, two hundred twelve million, one hundred thirty thousand, twenty-one".