12121021222211 has 8 divisors (see below), whose sum is σ = 13353852364848. Its totient is φ = 10910010100000.

The previous prime is 12121021222207. The next prime is 12121021222249. The reversal of 12121021222211 is 11222212012121.

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

It is not a de Polignac number, because 12121021222211 - 2² = 12121021222207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12121021222111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5455003940 + ... + 5455006161.

It is an arithmetic number, because the mean of its divisors is an integer number (1669231545606).

Almost surely, 2^{12121021222211} is an apocalyptic number.

12121021222211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12121021222211 is a deficient number, since it is larger than the sum of its proper divisors (1232831142637).

12121021222211 is a wasteful number, since it uses less digits than its factorization.

12121021222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10910010213.

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

Adding to 12121021222211 its reverse (11222212012121), we get a palindrome (23343233234332).

The spelling of 12121021222211 in words is "twelve trillion, one hundred twenty-one billion, twenty-one million, two hundred twenty-two thousand, two hundred eleven".