12161061215 has 8 divisors (see below), whose sum is σ = 14594666928. Its totient is φ = 9727920000.

The previous prime is 12161061203. The next prime is 12161061217. The reversal of 12161061215 is 51216016121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12161061215 - 2¹² = 12161057119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161061217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55661 + ... + 165590.

It is an arithmetic number, because the mean of its divisors is an integer number (1824333366).

Almost surely, 2^12161061215 is an apocalyptic number.

12161061215 is a deficient number, since it is larger than the sum of its proper divisors (2433605713).

12161061215 is a wasteful number, since it uses less digits than its factorization.

12161061215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232249.

The product of its (nonzero) digits is 720, while the sum is 26.

Adding to 12161061215 its reverse (51216016121), we get a palindrome (63377077336).

The spelling of 12161061215 in words is "twelve billion, one hundred sixty-one million, sixty-one thousand, two hundred fifteen".