16124116021 has 24 divisors (see below), whose sum is σ = 18482379944. Its totient is φ = 13980625920.

The previous prime is 16124116009. The next prime is 16124116037. The reversal of 16124116021 is 12061142161.

It can be written as a sum of positive squares in 12 ways, for example, as 3119222500 + 13004893521 = 55850^2 + 114039^2 .

It is not a de Polignac number, because 16124116021 - 2¹³ = 16124107829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16124116051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2028571 + ... + 2036503.

Almost surely, 2^16124116021 is an apocalyptic number.

It is an amenable number.

16124116021 is a deficient number, since it is larger than the sum of its proper divisors (2358263923).

16124116021 is a wasteful number, since it uses less digits than its factorization.

16124116021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8521 (or 8504 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

Adding to 16124116021 its reverse (12061142161), we get a palindrome (28185258182).

The spelling of 16124116021 in words is "sixteen billion, one hundred twenty-four million, one hundred sixteen thousand, twenty-one".