16401043122003 has 24 divisors (see below), whose sum is σ = 23901197905728. Its totient is φ = 10836744721152.

The previous prime is 16401043122001. The next prime is 16401043122019. The reversal of 16401043122003 is 30022134010461.

It is a happy number.

16401043122003 is a `hidden beast` number, since 1 + 6 + 4 + 0 + 1 + 0 + 431 + 220 + 0 + 3 = 666.

It is not a de Polignac number, because 16401043122003 - 2¹ = 16401043122001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16401043122001) 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, 21301126 + ... + 22057652.

It is an arithmetic number, because the mean of its divisors is an integer number (995883246072).

Almost surely, 2^{16401043122003} is an apocalyptic number.

16401043122003 is a deficient number, since it is larger than the sum of its proper divisors (7500154783725).

16401043122003 is a wasteful number, since it uses less digits than its factorization.

16401043122003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777963 (or 777960 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 16401043122003 its reverse (30022134010461), we get a palindrome (46423177132464).

The spelling of 16401043122003 in words is "sixteen trillion, four hundred one billion, forty-three million, one hundred twenty-two thousand, three".