121222222222121 has 16 divisors (see below), whose sum is σ = 132493135320000. Its totient is φ = 110469831667776.

The previous prime is 121222222222051. The next prime is 121222222222163.

121222222222121 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 121222222222121 - 2¹⁸ = 121222221959977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121222222222181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 408781211 + ... + 409077648.

It is an arithmetic number, because the mean of its divisors is an integer number (8280820957500).

Almost surely, 2^{121222222222121} is an apocalyptic number.

It is an amenable number.

121222222222121 is a deficient number, since it is larger than the sum of its proper divisors (11270913097879).

121222222222121 is a wasteful number, since it uses less digits than its factorization.

121222222222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817859176.

The product of its digits is 2048, while the sum is 26.

The spelling of 121222222222121 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty-one".