121221449 has 2 divisors, whose sum is σ = 121221450. Its totient is φ = 121221448.

The previous prime is 121221403. The next prime is 121221473. The reversal of 121221449 is 944122121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110775625 + 10445824 = 10525^2 + 3232^2 .

It is an emirp because it is prime and its reverse (944122121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121221449 - 2¹² = 121217353 is a prime.

It is not a weakly prime, because it can be changed into another prime (121224449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610724 + 60610725.

It is an arithmetic number, because the mean of its divisors is an integer number (60610725).

Almost surely, 2^121221449 is an apocalyptic number.

It is an amenable number.

121221449 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221449 is an equidigital number, since it uses as much as digits as its factorization.

121221449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 121221449 is about 11010.0612623182. The cubic root of 121221449 is about 494.9102976590.

The spelling of 121221449 in words is "one hundred twenty-one million, two hundred twenty-one thousand, four hundred forty-nine".