12215210555466 has 40 divisors (see below), whose sum is σ = 27376312668804. Its totient is φ = 4070964381120.

The previous prime is 12215210555459. The next prime is 12215210555479. The reversal of 12215210555466 is 66455501251221.

It is a happy number.

12215210555466 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 52 + 1 + 0 + 55 + 546 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12100275317025 + 114935238441 = 3478545^2 + 339021^2 .

It is a super-2 number, since 2×12215210555466² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6295645 + ... + 8004096.

Almost surely, 2^{12215210555466} is an apocalyptic number.

12215210555466 is an abundant number, since it is smaller than the sum of its proper divisors (15161102113338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12215210555466 is a wasteful number, since it uses less digits than its factorization.

12215210555466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14305028 (or 14305019 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 45.

The spelling of 12215210555466 in words is "twelve trillion, two hundred fifteen billion, two hundred ten million, five hundred fifty-five thousand, four hundred sixty-six".