12212221221021 has 8 divisors (see below), whose sum is σ = 16283240779680. Its totient is φ = 8141341238192.

The previous prime is 12212221220977. The next prime is 12212221221059. The reversal of 12212221221021 is 12012212221221.

12212221221021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12212221221021 - 2¹⁹ = 12212220696733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212221201021) 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, 34689630 + ... + 35039903.

It is an arithmetic number, because the mean of its divisors is an integer number (2035405097460).

Almost surely, 2^{12212221221021} is an apocalyptic number.

It is an amenable number.

12212221221021 is a deficient number, since it is larger than the sum of its proper divisors (4071019558659).

12212221221021 is an equidigital number, since it uses as much as digits as its factorization.

12212221221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69787915.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12212221221021 its reverse (12012212221221), we get a palindrome (24224433442242).

The spelling of 12212221221021 in words is "twelve trillion, two hundred twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, twenty-one".