16372421211 has 4 divisors (see below), whose sum is σ = 21829894952. Its totient is φ = 10914947472.

The previous prime is 16372421161. The next prime is 16372421243. The reversal of 16372421211 is 11212427361.

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

It is not a de Polignac number, because 16372421211 - 2⁶ = 16372421147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16372421711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2728736866 + ... + 2728736871.

It is an arithmetic number, because the mean of its divisors is an integer number (5457473738).

Almost surely, 2^16372421211 is an apocalyptic number.

16372421211 is a deficient number, since it is larger than the sum of its proper divisors (5457473741).

16372421211 is an equidigital number, since it uses as much as digits as its factorization.

16372421211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5457473740.

The product of its digits is 4032, while the sum is 30.

Adding to 16372421211 its reverse (11212427361), we get a palindrome (27584848572).

The spelling of 16372421211 in words is "sixteen billion, three hundred seventy-two million, four hundred twenty-one thousand, two hundred eleven".