16121041115015 has 4 divisors (see below), whose sum is σ = 19345249338024. Its totient is φ = 12896832892008.

The previous prime is 16121041114999. The next prime is 16121041115029. The reversal of 16121041115015 is 51051114012161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16121041115015 - 2⁴ = 16121041114999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1612104111497 + ... + 1612104111506.

It is an arithmetic number, because the mean of its divisors is an integer number (4836312334506).

Almost surely, 2^{16121041115015} is an apocalyptic number.

16121041115015 is a deficient number, since it is larger than the sum of its proper divisors (3224208223009).

16121041115015 is an equidigital number, since it uses as much as digits as its factorization.

16121041115015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3224208223008.

The product of its (nonzero) digits is 1200, while the sum is 29.

Adding to 16121041115015 its reverse (51051114012161), we get a palindrome (67172155127176).

The spelling of 16121041115015 in words is "sixteen trillion, one hundred twenty-one billion, forty-one million, one hundred fifteen thousand, fifteen".