16049571121 has 2 divisors, whose sum is σ = 16049571122. Its totient is φ = 16049571120.

The previous prime is 16049571119. The next prime is 16049571151. The reversal of 16049571121 is 12117594061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11672425521 + 4377145600 = 108039^2 + 66160^2 .

It is a cyclic number.

It is not a de Polignac number, because 16049571121 - 2¹ = 16049571119 is a prime.

Together with 16049571119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16049571151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8024785560 + 8024785561.

It is an arithmetic number, because the mean of its divisors is an integer number (8024785561).

Almost surely, 2^16049571121 is an apocalyptic number.

It is an amenable number.

16049571121 is a deficient number, since it is larger than the sum of its proper divisors (1).

16049571121 is an equidigital number, since it uses as much as digits as its factorization.

16049571121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 37.

The spelling of 16049571121 in words is "sixteen billion, forty-nine million, five hundred seventy-one thousand, one hundred twenty-one".