21120044371 has 2 divisors, whose sum is σ = 21120044372. Its totient is φ = 21120044370.

The previous prime is 21120044369. The next prime is 21120044383. The reversal of 21120044371 is 17344002112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21120044371 - 2¹ = 21120044369 is a prime.

Together with 21120044369, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21120044171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560022185 + 10560022186.

It is an arithmetic number, because the mean of its divisors is an integer number (10560022186).

Almost surely, 2^21120044371 is an apocalyptic number.

21120044371 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120044371 is an equidigital number, since it uses as much as digits as its factorization.

21120044371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 21120044371 its reverse (17344002112), we get a palindrome (38464046483).

The spelling of 21120044371 in words is "twenty-one billion, one hundred twenty million, forty-four thousand, three hundred seventy-one".