121762720063 has 2 divisors, whose sum is σ = 121762720064. Its totient is φ = 121762720062.

The previous prime is 121762720043. The next prime is 121762720087. The reversal of 121762720063 is 360027267121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121762720063 - 2¹⁷ = 121762588991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121762720003) 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, 60881360031 + 60881360032.

It is an arithmetic number, because the mean of its divisors is an integer number (60881360032).

Almost surely, 2^121762720063 is an apocalyptic number.

121762720063 is a deficient number, since it is larger than the sum of its proper divisors (1).

121762720063 is an equidigital number, since it uses as much as digits as its factorization.

121762720063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 37.

Adding to 121762720063 its reverse (360027267121), we get a palindrome (481789987184).

The spelling of 121762720063 in words is "one hundred twenty-one billion, seven hundred sixty-two million, seven hundred twenty thousand, sixty-three".