21441953111 has 8 divisors (see below), whose sum is σ = 21685409424. Its totient is φ = 21198954240.

The previous prime is 21441953087. The next prime is 21441953153. The reversal of 21441953111 is 11135914412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21441953111 - 2¹⁰ = 21441952087 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 (21441956111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19640 + ... + 208013.

It is an arithmetic number, because the mean of its divisors is an integer number (2710676178).

Almost surely, 2^21441953111 is an apocalyptic number.

21441953111 is a deficient number, since it is larger than the sum of its proper divisors (243456313).

21441953111 is an equidigital number, since it uses as much as digits as its factorization.

21441953111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228721.

The product of its digits is 4320, while the sum is 32.

The spelling of 21441953111 in words is "twenty-one billion, four hundred forty-one million, nine hundred fifty-three thousand, one hundred eleven".