121573265217163 has 2 divisors, whose sum is σ = 121573265217164. Its totient is φ = 121573265217162.

The previous prime is 121573265217137. The next prime is 121573265217169. The reversal of 121573265217163 is 361712562375121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121573265217163 - 2¹³ = 121573265208971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121573265217163.

It is not a weakly prime, because it can be changed into another prime (121573265217169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60786632608581 + 60786632608582.

It is an arithmetic number, because the mean of its divisors is an integer number (60786632608582).

Almost surely, 2^{121573265217163} is an apocalyptic number.

121573265217163 is a deficient number, since it is larger than the sum of its proper divisors (1).

121573265217163 is an equidigital number, since it uses as much as digits as its factorization.

121573265217163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 52.

The spelling of 121573265217163 in words is "one hundred twenty-one trillion, five hundred seventy-three billion, two hundred sixty-five million, two hundred seventeen thousand, one hundred sixty-three".