121221021212211 has 8 divisors (see below), whose sum is σ = 161671395088384. Its totient is φ = 80792330738760.

The previous prime is 121221021212189. The next prime is 121221021212233. The reversal of 121221021212211 is 112212120122121.

It is an interprime number because it is at equal distance from previous prime (121221021212189) and next prime (121221021212233).

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

It is not a de Polignac number, because 121221021212211 - 2³⁰ = 121219947470387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121221021212261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5420837635 + ... + 5420859996.

It is an arithmetic number, because the mean of its divisors is an integer number (20208924386048).

Almost surely, 2^{121221021212211} is an apocalyptic number.

121221021212211 is a deficient number, since it is larger than the sum of its proper divisors (40450373876173).

121221021212211 is a wasteful number, since it uses less digits than its factorization.

121221021212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10841701361.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 121221021212211 its reverse (112212120122121), we get a palindrome (233433141334332).

The spelling of 121221021212211 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-one million, two hundred twelve thousand, two hundred eleven".