121225186613 has 2 divisors, whose sum is σ = 121225186614. Its totient is φ = 121225186612.

The previous prime is 121225186573. The next prime is 121225186633. The reversal of 121225186613 is 316681522121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120608260369 + 616926244 = 347287^2 + 24838^2 .

It is a cyclic number.

It is not a de Polignac number, because 121225186613 - 2⁶ = 121225186549 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121225186633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60612593306 + 60612593307.

It is an arithmetic number, because the mean of its divisors is an integer number (60612593307).

Almost surely, 2^121225186613 is an apocalyptic number.

It is an amenable number.

121225186613 is a deficient number, since it is larger than the sum of its proper divisors (1).

121225186613 is an equidigital number, since it uses as much as digits as its factorization.

121225186613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The spelling of 121225186613 in words is "one hundred twenty-one billion, two hundred twenty-five million, one hundred eighty-six thousand, six hundred thirteen".