121212253 has 2 divisors, whose sum is σ = 121212254. Its totient is φ = 121212252.

The previous prime is 121212209. The next prime is 121212281. The reversal of 121212253 is 352212121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117983044 + 3229209 = 10862^2 + 1797^2 .

It is an emirp because it is prime and its reverse (352212121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121212253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121212253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121212853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606126 + 60606127.

It is an arithmetic number, because the mean of its divisors is an integer number (60606127).

Almost surely, 2^121212253 is an apocalyptic number.

It is an amenable number.

121212253 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212253 is an equidigital number, since it uses as much as digits as its factorization.

121212253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 19.

The square root of 121212253 is about 11009.6436363762. The cubic root of 121212253 is about 494.8977825190.

Adding to 121212253 its reverse (352212121), we get a palindrome (473424374).

The spelling of 121212253 in words is "one hundred twenty-one million, two hundred twelve thousand, two hundred fifty-three".