121100249 has 2 divisors, whose sum is σ = 121100250. Its totient is φ = 121100248.

The previous prime is 121100233. The next prime is 121100257. The reversal of 121100249 is 942001121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114340249 + 6760000 = 10693^2 + 2600^2 .

It is an emirp because it is prime and its reverse (942001121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121100249 - 2⁴ = 121100233 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121100249.

It is not a weakly prime, because it can be changed into another prime (121100219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550124 + 60550125.

It is an arithmetic number, because the mean of its divisors is an integer number (60550125).

Almost surely, 2^121100249 is an apocalyptic number.

It is an amenable number.

121100249 is a deficient number, since it is larger than the sum of its proper divisors (1).

121100249 is an equidigital number, since it uses as much as digits as its factorization.

121100249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 121100249 is about 11004.5558292918. Note that the first 3 decimals coincide. The cubic root of 121100249 is about 494.7453017485.

The spelling of 121100249 in words is "one hundred twenty-one million, one hundred thousand, two hundred forty-nine".