16361221115 has 8 divisors (see below), whose sum is σ = 19634520048. Its totient is φ = 13088273760.

The previous prime is 16361221103. The next prime is 16361221133. The reversal of 16361221115 is 51112216361.

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

It is not a de Polignac number, because 16361221115 - 2⁴ = 16361221099 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28505 + ... + 183125.

It is an arithmetic number, because the mean of its divisors is an integer number (2454315006).

Almost surely, 2^16361221115 is an apocalyptic number.

16361221115 is a deficient number, since it is larger than the sum of its proper divisors (3273298933).

16361221115 is a wasteful number, since it uses less digits than its factorization.

16361221115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175789.

The product of its digits is 2160, while the sum is 29.

Adding to 16361221115 its reverse (51112216361), we get a palindrome (67473437476).

The spelling of 16361221115 in words is "sixteen billion, three hundred sixty-one million, two hundred twenty-one thousand, one hundred fifteen".