120611655555997 has 2 divisors, whose sum is σ = 120611655555998. Its totient is φ = 120611655555996.

The previous prime is 120611655555959. The next prime is 120611655556111. The reversal of 120611655555997 is 799555556116021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102318464637081 + 18293190918916 = 10115259^2 + 4277054^2 .

It is a cyclic number.

It is not a de Polignac number, because 120611655555997 - 2¹⁹ = 120611655031709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120611655555917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60305827777998 + 60305827777999.

It is an arithmetic number, because the mean of its divisors is an integer number (60305827777999).

Almost surely, 2^{120611655555997} is an apocalyptic number.

It is an amenable number.

120611655555997 is a deficient number, since it is larger than the sum of its proper divisors (1).

120611655555997 is an equidigital number, since it uses as much as digits as its factorization.

120611655555997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127575000, while the sum is 67.

The spelling of 120611655555997 in words is "one hundred twenty trillion, six hundred eleven billion, six hundred fifty-five million, five hundred fifty-five thousand, nine hundred ninety-seven".