121222220122121 has 8 divisors (see below), whose sum is σ = 128354394817440. Its totient is φ = 114090207189568.

The previous prime is 121222220122067. The next prime is 121222220122151. The reversal of 121222220122121 is 121221022222121.

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 121222220122121 - 2¹⁰ = 121222220121097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121222220122151) 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, 38896151 + ... + 41896956.

It is an arithmetic number, because the mean of its divisors is an integer number (16044299352180).

Almost surely, 2^{121222220122121} is an apocalyptic number.

It is an amenable number.

121222220122121 is a deficient number, since it is larger than the sum of its proper divisors (7132174695319).

121222220122121 is an equidigital number, since it uses as much as digits as its factorization.

121222220122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80881383.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 121222220122121 its reverse (121221022222121), we get a palindrome (242443242344242).

The spelling of 121222220122121 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, two hundred twenty million, one hundred twenty-two thousand, one hundred twenty-one".