21441119977 has 4 divisors (see below), whose sum is σ = 21441577216. Its totient is φ = 21440662740.

The previous prime is 21441119923. The next prime is 21441119989. The reversal of 21441119977 is 77991114412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21441119977 - 2²⁷ = 21306902249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21441119477) 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, 149049 + ... + 255142.

It is an arithmetic number, because the mean of its divisors is an integer number (5360394304).

Almost surely, 2^21441119977 is an apocalyptic number.

It is an amenable number.

21441119977 is a deficient number, since it is larger than the sum of its proper divisors (457239).

21441119977 is an equidigital number, since it uses as much as digits as its factorization.

21441119977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457238.

The product of its digits is 127008, while the sum is 46.

The spelling of 21441119977 in words is "twenty-one billion, four hundred forty-one million, one hundred nineteen thousand, nine hundred seventy-seven".