121221020212221 has 8 divisors (see below), whose sum is σ = 164367485033760. Its totient is φ = 79444284432752.

The previous prime is 121221020212181. The next prime is 121221020212223. The reversal of 121221020212221 is 122212020122121.

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 121221020212221 - 2¹⁰ = 121221020211197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221020212223) 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, 342432260310 + ... + 342432260663.

It is an arithmetic number, because the mean of its divisors is an integer number (20545935629220).

Almost surely, 2^{121221020212221} is an apocalyptic number.

It is an amenable number.

121221020212221 is a deficient number, since it is larger than the sum of its proper divisors (43146464821539).

121221020212221 is an equidigital number, since it uses as much as digits as its factorization.

121221020212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684864521035.

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

Adding to 121221020212221 its reverse (122212020122121), we get a palindrome (243433040334342).

The spelling of 121221020212221 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred twelve thousand, two hundred twenty-one".