121200020001121 has 2 divisors, whose sum is σ = 121200020001122. Its totient is φ = 121200020001120.

The previous prime is 121200020001103. The next prime is 121200020001133. The reversal of 121200020001121 is 121100020002121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112861641860496 + 8338378140625 = 10623636^2 + 2887625^2 .

It is a cyclic number.

It is not a de Polignac number, because 121200020001121 - 2⁵ = 121200020001089 is a prime.

It is not a weakly prime, because it can be changed into another prime (121200020002121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600010000560 + 60600010000561.

It is an arithmetic number, because the mean of its divisors is an integer number (60600010000561).

Almost surely, 2^{121200020001121} is an apocalyptic number.

It is an amenable number.

121200020001121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121200020001121 is an equidigital number, since it uses as much as digits as its factorization.

121200020001121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121200020001121 its reverse (121100020002121), we get a palindrome (242300040003242).

The spelling of 121200020001121 in words is "one hundred twenty-one trillion, two hundred billion, twenty million, one thousand, one hundred twenty-one".