16121212960040 has 64 divisors (see below), whose sum is σ = 36717149439360. Its totient is φ = 6369792549120.

The previous prime is 16121212959991. The next prime is 16121212960043. The reversal of 16121212960040 is 4006921212161.

It is not an unprimeable number, because it can be changed into a prime (16121212960043) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3292466 + ... + 6563745.

It is an arithmetic number, because the mean of its divisors is an integer number (573705459990).

Almost surely, 2^{16121212960040} is an apocalyptic number.

16121212960040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16121212960040 is an abundant number, since it is smaller than the sum of its proper divisors (20595936479320).

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

16121212960040 is a wasteful number, since it uses less digits than its factorization.

16121212960040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9856722 (or 9856718 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 16121212960040 in words is "sixteen trillion, one hundred twenty-one billion, two hundred twelve million, nine hundred sixty thousand, forty".