121665303271 has 2 divisors, whose sum is σ = 121665303272. Its totient is φ = 121665303270.

The previous prime is 121665303233. The next prime is 121665303307. The reversal of 121665303271 is 172303566121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121665303271 - 2⁷ = 121665303143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121665303271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121665307271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60832651635 + 60832651636.

It is an arithmetic number, because the mean of its divisors is an integer number (60832651636).

Almost surely, 2^121665303271 is an apocalyptic number.

121665303271 is a deficient number, since it is larger than the sum of its proper divisors (1).

121665303271 is an equidigital number, since it uses as much as digits as its factorization.

121665303271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

Adding to 121665303271 its reverse (172303566121), we get a palindrome (293968869392).

The spelling of 121665303271 in words is "one hundred twenty-one billion, six hundred sixty-five million, three hundred three thousand, two hundred seventy-one".