121222001212121 has 4 divisors (see below), whose sum is σ = 121222488181200. Its totient is φ = 121221514243044.

The previous prime is 121222001212061. The next prime is 121222001212139. The reversal of 121222001212121 is 121212100222121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121222001212121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121222001212093 and 121222001212102.

It is not an unprimeable number, because it can be changed into a prime (121222001212421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243110951 + ... + 243609068.

It is an arithmetic number, because the mean of its divisors is an integer number (30305622045300).

Almost surely, 2^{121222001212121} is an apocalyptic number.

It is an amenable number.

121222001212121 is a deficient number, since it is larger than the sum of its proper divisors (486969079).

121222001212121 is an equidigital number, since it uses as much as digits as its factorization.

121222001212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486969078.

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

Adding to 121222001212121 its reverse (121212100222121), we get a palindrome (242434101434242).

The spelling of 121222001212121 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, one million, two hundred twelve thousand, one hundred twenty-one".