12216562134 has 64 divisors (see below), whose sum is σ = 29662972416. Its totient is φ = 3274366464.

The previous prime is 12216562129. The next prime is 12216562147. The reversal of 12216562134 is 43126561221.

It is a junction number, because it is equal to n+sod(n) for n = 12216562095 and 12216562104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191332 + ... + 247064.

It is an arithmetic number, because the mean of its divisors is an integer number (463483944).

Almost surely, 2^12216562134 is an apocalyptic number.

12216562134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12216562134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14831486208).

12216562134 is an abundant number, since it is smaller than the sum of its proper divisors (17446410282).

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

12216562134 is a wasteful number, since it uses less digits than its factorization.

12216562134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56069.

The product of its digits is 17280, while the sum is 33.

The spelling of 12216562134 in words is "twelve billion, two hundred sixteen million, five hundred sixty-two thousand, one hundred thirty-four".