121200200121101 has 2 divisors, whose sum is σ = 121200200121102. Its totient is φ = 121200200121100.

The previous prime is 121200200121067. The next prime is 121200200121103. The reversal of 121200200121101 is 101121002002121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116271471555625 + 4928728565476 = 10782925^2 + 2220074^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121200200121101 is a prime.

Together with 121200200121103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121200200121103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600100060550 + 60600100060551.

It is an arithmetic number, because the mean of its divisors is an integer number (60600100060551).

Almost surely, 2^{121200200121101} is an apocalyptic number.

It is an amenable number.

121200200121101 is a deficient number, since it is larger than the sum of its proper divisors (1).

121200200121101 is an equidigital number, since it uses as much as digits as its factorization.

121200200121101 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 14.

Adding to 121200200121101 its reverse (101121002002121), we get a palindrome (222321202123222).

The spelling of 121200200121101 in words is "one hundred twenty-one trillion, two hundred billion, two hundred million, one hundred twenty-one thousand, one hundred one".