12216461365 has 8 divisors (see below), whose sum is σ = 14697441720. Its totient is φ = 9748043712.

The previous prime is 12216461359. The next prime is 12216461401. The reversal of 12216461365 is 56316461221.

It can be written as a sum of positive squares in 4 ways, for example, as 9084196 + 12207377169 = 3014^2 + 110487^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12216461365 - 2²⁵ = 12182906933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3138534 + ... + 3142423.

It is an arithmetic number, because the mean of its divisors is an integer number (1837180215).

Almost surely, 2^12216461365 is an apocalyptic number.

It is an amenable number.

12216461365 is a deficient number, since it is larger than the sum of its proper divisors (2480980355).

12216461365 is an equidigital number, since it uses as much as digits as its factorization.

12216461365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6281351.

The product of its digits is 51840, while the sum is 37.

The spelling of 12216461365 in words is "twelve billion, two hundred sixteen million, four hundred sixty-one thousand, three hundred sixty-five".