21024112241 has 4 divisors (see below), whose sum is σ = 22935395184. Its totient is φ = 19112829300.

The previous prime is 21024112171. The next prime is 21024112259. The reversal of 21024112241 is 14221142012.

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 a de Polignac number, because none of the positive numbers 2^k-21024112241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21024112741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 955641455 + ... + 955641476.

It is an arithmetic number, because the mean of its divisors is an integer number (5733848796).

Almost surely, 2^21024112241 is an apocalyptic number.

It is an amenable number.

21024112241 is a deficient number, since it is larger than the sum of its proper divisors (1911282943).

21024112241 is a wasteful number, since it uses less digits than its factorization.

21024112241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911282942.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21024112241 its reverse (14221142012), we get a palindrome (35245254253).

The spelling of 21024112241 in words is "twenty-one billion, twenty-four million, one hundred twelve thousand, two hundred forty-one".