121186660461653 has 2 divisors, whose sum is σ = 121186660461654. Its totient is φ = 121186660461652.

The previous prime is 121186660461611. The next prime is 121186660461679. The reversal of 121186660461653 is 356164066681121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100362387718609 + 20824272743044 = 10018103^2 + 4563362^2 .

It is a cyclic number.

It is not a de Polignac number, because 121186660461653 - 2⁶ = 121186660461589 is a prime.

It is a super-2 number, since 2×121186660461653² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121186660461253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60593330230826 + 60593330230827.

It is an arithmetic number, because the mean of its divisors is an integer number (60593330230827).

Almost surely, 2^{121186660461653} is an apocalyptic number.

It is an amenable number.

121186660461653 is a deficient number, since it is larger than the sum of its proper divisors (1).

121186660461653 is an equidigital number, since it uses as much as digits as its factorization.

121186660461653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7464960, while the sum is 56.

The spelling of 121186660461653 in words is "one hundred twenty-one trillion, one hundred eighty-six billion, six hundred sixty million, four hundred sixty-one thousand, six hundred fifty-three".