12021112221211 has 4 divisors (see below), whose sum is σ = 12021903463432. Its totient is φ = 12020320978992.

The previous prime is 12021112221161. The next prime is 12021112221257. The reversal of 12021112221211 is 11212221112021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12021112221211 - 2²¹ = 12021110124059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021112228211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395598321 + ... + 395628706.

It is an arithmetic number, because the mean of its divisors is an integer number (3005475865858).

Almost surely, 2^{12021112221211} is an apocalyptic number.

12021112221211 is a deficient number, since it is larger than the sum of its proper divisors (791242221).

12021112221211 is an equidigital number, since it uses as much as digits as its factorization.

12021112221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791242220.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12021112221211 its reverse (11212221112021), we get a palindrome (23233333333232).

The spelling of 12021112221211 in words is "twelve trillion, twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, two hundred eleven".