121200001121 has 2 divisors, whose sum is σ = 121200001122. Its totient is φ = 121200001120.

The previous prime is 121200001081. The next prime is 121200001211. The reversal of 121200001121 is 121100002121.

Together with next prime (121200001211) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121059460096 + 140541025 = 347936^2 + 11855^2 .

It is a cyclic number.

It is not a de Polignac number, because 121200001121 - 2²² = 121195806817 is a prime.

It is not a weakly prime, because it can be changed into another prime (121200003121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600000560 + 60600000561.

It is an arithmetic number, because the mean of its divisors is an integer number (60600000561).

Almost surely, 2^121200001121 is an apocalyptic number.

It is an amenable number.

121200001121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121200001121 is an equidigital number, since it uses as much as digits as its factorization.

121200001121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121200001121 its reverse (121100002121), we get a palindrome (242300003242).

The spelling of 121200001121 in words is "one hundred twenty-one billion, two hundred million, one thousand, one hundred twenty-one".