121212853 has 2 divisors, whose sum is σ = 121212854. Its totient is φ = 121212852.

The previous prime is 121212811. The next prime is 121212863. The reversal of 121212853 is 358212121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111365809 + 9847044 = 10553^2 + 3138^2 .

It is a cyclic number.

It is not a de Polignac number, because 121212853 - 2⁹ = 121212341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121212863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606426 + 60606427.

It is an arithmetic number, because the mean of its divisors is an integer number (60606427).

Almost surely, 2^121212853 is an apocalyptic number.

It is an amenable number.

121212853 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212853 is an equidigital number, since it uses as much as digits as its factorization.

121212853 is an odious number, because the sum of its binary digits is odd.

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

The square root of 121212853 is about 11009.6708851809. The cubic root of 121212853 is about 494.8985990981.

Adding to 121212853 its reverse (358212121), we get a palindrome (479424974).

The spelling of 121212853 in words is "one hundred twenty-one million, two hundred twelve thousand, eight hundred fifty-three".