1212161765361 has 8 divisors (see below), whose sum is σ = 1668351677184. Its totient is φ = 782039848560.

The previous prime is 1212161765359. The next prime is 1212161765363. The reversal of 1212161765361 is 1635671612121.

It is an interprime number because it is at equal distance from previous prime (1212161765359) and next prime (1212161765363).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1212161765361 - 2¹ = 1212161765359 is a prime.

It is a super-2 number, since 2×1212161765361² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1212161765363) 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 in 7 ways as a sum of consecutive naturals, for example, 6516998646 + ... + 6516998831.

It is an arithmetic number, because the mean of its divisors is an integer number (208543959648).

Almost surely, 2^{1212161765361} is an apocalyptic number.

It is an amenable number.

1212161765361 is a deficient number, since it is larger than the sum of its proper divisors (456189911823).

1212161765361 is a wasteful number, since it uses less digits than its factorization.

1212161765361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13033997511.

The product of its digits is 90720, while the sum is 42.

The spelling of 1212161765361 in words is "one trillion, two hundred twelve billion, one hundred sixty-one million, seven hundred sixty-five thousand, three hundred sixty-one".