121200011 has 2 divisors, whose sum is σ = 121200012. Its totient is φ = 121200010.

The previous prime is 121199989. The next prime is 121200017. The reversal of 121200011 is 110002121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121200011 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (121200017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600005 + 60600006.

It is an arithmetic number, because the mean of its divisors is an integer number (60600006).

Almost surely, 2^121200011 is an apocalyptic number.

121200011 is a deficient number, since it is larger than the sum of its proper divisors (1).

121200011 is an equidigital number, since it uses as much as digits as its factorization.

121200011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 121200011 is about 11009.0876552056. The cubic root of 121200011 is about 494.8811209949.

Adding to 121200011 its reverse (110002121), we get a palindrome (231202132).

The spelling of 121200011 in words is "one hundred twenty-one million, two hundred thousand, eleven".