121810453 has 2 divisors, whose sum is σ = 121810454. Its totient is φ = 121810452.

The previous prime is 121810427. The next prime is 121810459. The reversal of 121810453 is 354018121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113060689 + 8749764 = 10633^2 + 2958^2 .

It is a cyclic number.

It is not a de Polignac number, because 121810453 - 2⁵ = 121810421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121810459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60905226 + 60905227.

It is an arithmetic number, because the mean of its divisors is an integer number (60905227).

Almost surely, 2^121810453 is an apocalyptic number.

It is an amenable number.

121810453 is a deficient number, since it is larger than the sum of its proper divisors (1).

121810453 is an equidigital number, since it uses as much as digits as its factorization.

121810453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 121810453 is about 11036.7772923078. Note that the first 3 decimals coincide. The cubic root of 121810453 is about 495.7105776067.

Adding to 121810453 its reverse (354018121), we get a palindrome (475828574).

The spelling of 121810453 in words is "one hundred twenty-one million, eight hundred ten thousand, four hundred fifty-three".