16121401313 has 4 divisors (see below), whose sum is σ = 16557114900. Its totient is φ = 15685687728.

The previous prime is 16121401271. The next prime is 16121401337. The reversal of 16121401313 is 31310412161.

It is a happy number.

16121401313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15064371169 + 1057030144 = 122737^2 + 32512^2 .

It is a cyclic number.

It is not a de Polignac number, because 16121401313 - 2⁸ = 16121401057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16121401013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217856738 + ... + 217856811.

It is an arithmetic number, because the mean of its divisors is an integer number (4139278725).

Almost surely, 2^16121401313 is an apocalyptic number.

It is an amenable number.

16121401313 is a deficient number, since it is larger than the sum of its proper divisors (435713587).

16121401313 is an equidigital number, since it uses as much as digits as its factorization.

16121401313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435713586.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 16121401313 its reverse (31310412161), we get a palindrome (47431813474).

The spelling of 16121401313 in words is "sixteen billion, one hundred twenty-one million, four hundred one thousand, three hundred thirteen".