16120531321 has 8 divisors (see below), whose sum is σ = 16404429888. Its totient is φ = 15839070000.

The previous prime is 16120531291. The next prime is 16120531373. The reversal of 16120531321 is 12313502161.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 16120531321 - 2⁵ = 16120531289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16120531391) 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, 595965 + ... + 622426.

It is an arithmetic number, because the mean of its divisors is an integer number (2050553736).

Almost surely, 2^16120531321 is an apocalyptic number.

It is an amenable number.

16120531321 is a deficient number, since it is larger than the sum of its proper divisors (283898567).

16120531321 is a wasteful number, since it uses less digits than its factorization.

16120531321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218623.

The product of its (nonzero) digits is 1080, while the sum is 25.

The spelling of 16120531321 in words is "sixteen billion, one hundred twenty million, five hundred thirty-one thousand, three hundred twenty-one".