2016121671 has 28 divisors (see below), whose sum is σ = 3027041640. Its totient is φ = 1342195920.

The previous prime is 2016121621. The next prime is 2016121687. The reversal of 2016121671 is 1761216102.

It is a happy number.

2016121671 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2016121671 - 2¹⁹ = 2015597383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2016121621) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 684520 + ... + 687458.

It is an arithmetic number, because the mean of its divisors is an integer number (108108630).

Almost surely, 2^2016121671 is an apocalyptic number.

2016121671 is a deficient number, since it is larger than the sum of its proper divisors (1010919969).

2016121671 is an frugal number, since it uses more digits than its factorization.

2016121671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3898 (or 3883 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 2016121671 is about 44901.2435351183. The cubic root of 2016121671 is about 1263.2973329681.

Adding to 2016121671 its reverse (1761216102), we get a palindrome (3777337773).

The spelling of 2016121671 in words is "two billion, sixteen million, one hundred twenty-one thousand, six hundred seventy-one".