12212011212221 has 8 divisors (see below), whose sum is σ = 12933161778624. Its totient is φ = 11506710108960.

The previous prime is 12212011212217. The next prime is 12212011212239. The reversal of 12212011212221 is 12221211021221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12212011212221 - 2² = 12212011212217 is a prime.

It is a super-2 number, since 2×12212011212221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212011212193 and 12212011212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212011212721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3962364200 + ... + 3962367281.

It is an arithmetic number, because the mean of its divisors is an integer number (1616645222328).

Almost surely, 2^{12212011212221} is an apocalyptic number.

It is an amenable number.

12212011212221 is a deficient number, since it is larger than the sum of its proper divisors (721150566403).

12212011212221 is an equidigital number, since it uses as much as digits as its factorization.

12212011212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7924731571.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12212011212221 its reverse (12221211021221), we get a palindrome (24433222233442).

The spelling of 12212011212221 in words is "twelve trillion, two hundred twelve billion, eleven million, two hundred twelve thousand, two hundred twenty-one".