121221021222211 has 8 divisors (see below), whose sum is σ = 125448005620800. Its totient is φ = 116997166769280.

The previous prime is 121221021222137. The next prime is 121221021222263. The reversal of 121221021222211 is 112222120122121.

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 121221021222211 - 2¹¹ = 121221021220163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121221021222911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 782407606 + ... + 782562523.

It is an arithmetic number, because the mean of its divisors is an integer number (15681000702600).

Almost surely, 2^{121221021222211} is an apocalyptic number.

121221021222211 is a deficient number, since it is larger than the sum of its proper divisors (4226984398589).

121221021222211 is a wasteful number, since it uses less digits than its factorization.

121221021222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564972829.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 121221021222211 its reverse (112222120122121), we get a palindrome (233443141344332).

The spelling of 121221021222211 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-one million, two hundred twenty-two thousand, two hundred eleven".