220161212516 has 12 divisors (see below), whose sum is σ = 440322425088. Its totient is φ = 94354805352.

The previous prime is 220161212497. The next prime is 220161212519. The reversal of 220161212516 is 615212161022.

220161212516 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (220161212519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3931450196 + ... + 3931450251.

It is an arithmetic number, because the mean of its divisors is an integer number (36693535424).

Almost surely, 2^220161212516 is an apocalyptic number.

It is an amenable number.

220161212516 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

220161212516 is a wasteful number, since it uses less digits than its factorization.

220161212516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7862900458 (or 7862900456 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 220161212516 its reverse (615212161022), we get a palindrome (835373373538).

The spelling of 220161212516 in words is "two hundred twenty billion, one hundred sixty-one million, two hundred twelve thousand, five hundred sixteen".