12216401536345 has 16 divisors (see below), whose sum is σ = 14900162614272. Its totient is φ = 9612804116160.

The previous prime is 12216401536333. The next prime is 12216401536387. The reversal of 12216401536345 is 54363510461221.

It is not a de Polignac number, because 12216401536345 - 2³⁵ = 12182041797977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42870004 + ... + 43154026.

It is an arithmetic number, because the mean of its divisors is an integer number (931260163392).

Almost surely, 2^{12216401536345} is an apocalyptic number.

It is an amenable number.

12216401536345 is a deficient number, since it is larger than the sum of its proper divisors (2683761077927).

12216401536345 is a wasteful number, since it uses less digits than its factorization.

12216401536345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425112.

The product of its (nonzero) digits is 518400, while the sum is 43.

Adding to 12216401536345 its reverse (54363510461221), we get a palindrome (66579911997566).

The spelling of 12216401536345 in words is "twelve trillion, two hundred sixteen billion, four hundred one million, five hundred thirty-six thousand, three hundred forty-five".