21112101441 has 8 divisors (see below), whose sum is σ = 31277187360. Its totient is φ = 14074734276.

The previous prime is 21112101433. The next prime is 21112101443. The reversal of 21112101441 is 14410121112.

21112101441 is a `hidden beast` number, since 2 + 1 + 11 + 210 + 1 + 441 = 666.

It is not a de Polignac number, because 21112101441 - 2³ = 21112101433 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21112101443) 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, 390964815 + ... + 390964868.

It is an arithmetic number, because the mean of its divisors is an integer number (3909648420).

Almost surely, 2^21112101441 is an apocalyptic number.

It is an amenable number.

21112101441 is a deficient number, since it is larger than the sum of its proper divisors (10165085919).

21112101441 is an equidigital number, since it uses as much as digits as its factorization.

21112101441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781929692 (or 781929686 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21112101441 its reverse (14410121112), we get a palindrome (35522222553).

The spelling of 21112101441 in words is "twenty-one billion, one hundred twelve million, one hundred one thousand, four hundred forty-one".