121120201112021 has 2 divisors, whose sum is σ = 121120201112022. Its totient is φ = 121120201112020.

The previous prime is 121120201112003. The next prime is 121120201112063. The reversal of 121120201112021 is 120211102021121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75425507865796 + 45694693246225 = 8684786^2 + 6759785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121120201112021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121120201112621) 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 as a sum of consecutive naturals, namely, 60560100556010 + 60560100556011.

It is an arithmetic number, because the mean of its divisors is an integer number (60560100556011).

Almost surely, 2^{121120201112021} is an apocalyptic number.

It is an amenable number.

121120201112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121120201112021 is an equidigital number, since it uses as much as digits as its factorization.

121120201112021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121120201112021 its reverse (120211102021121), we get a palindrome (241331303133142).

The spelling of 121120201112021 in words is "one hundred twenty-one trillion, one hundred twenty billion, two hundred one million, one hundred twelve thousand, twenty-one".