121655016271 has 2 divisors, whose sum is σ = 121655016272. Its totient is φ = 121655016270.

The previous prime is 121655016257. The next prime is 121655016277. The reversal of 121655016271 is 172610556121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121655016271 - 2¹¹ = 121655014223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121655016271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121655016277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60827508135 + 60827508136.

It is an arithmetic number, because the mean of its divisors is an integer number (60827508136).

Almost surely, 2^121655016271 is an apocalyptic number.

121655016271 is a deficient number, since it is larger than the sum of its proper divisors (1).

121655016271 is an equidigital number, since it uses as much as digits as its factorization.

121655016271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 121655016271 in words is "one hundred twenty-one billion, six hundred fifty-five million, sixteen thousand, two hundred seventy-one".