12121201987253 has 2 divisors, whose sum is σ = 12121201987254. Its totient is φ = 12121201987252.

The previous prime is 12121201987231. The next prime is 12121201987259. The reversal of 12121201987253 is 35278910212121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9222293933329 + 2898908053924 = 3036823^2 + 1702618^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121201987253 - 2⁶ = 12121201987189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121201987259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060600993626 + 6060600993627.

It is an arithmetic number, because the mean of its divisors is an integer number (6060600993627).

Almost surely, 2^{12121201987253} is an apocalyptic number.

It is an amenable number.

12121201987253 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121201987253 is an equidigital number, since it uses as much as digits as its factorization.

12121201987253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 44.

The spelling of 12121201987253 in words is "twelve trillion, one hundred twenty-one billion, two hundred one million, nine hundred eighty-seven thousand, two hundred fifty-three".