12216735081 has 12 divisors (see below), whose sum is σ = 17655127152. Its totient is φ = 8140459896.

The previous prime is 12216735079. The next prime is 12216735101. The reversal of 12216735081 is 18053761221.

12216735081 is a `hidden beast` number, since 1 + 221 + 6 + 7 + 350 + 81 = 666.

It is not a de Polignac number, because 12216735081 - 2¹ = 12216735079 is a prime.

It is a super-2 number, since 2×12216735081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12216735481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316591 + ... + 353076.

It is an arithmetic number, because the mean of its divisors is an integer number (1471260596).

Almost surely, 2^12216735081 is an apocalyptic number.

It is an amenable number.

12216735081 is a deficient number, since it is larger than the sum of its proper divisors (5438392071).

12216735081 is a wasteful number, since it uses less digits than its factorization.

12216735081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671700 (or 671697 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 12216735081 in words is "twelve billion, two hundred sixteen million, seven hundred thirty-five thousand, eighty-one".