21244241123 has 16 divisors (see below), whose sum is σ = 24947431680. Its totient is φ = 17708603616.

The previous prime is 21244241071. The next prime is 21244241129. The reversal of 21244241123 is 32114244212.

It is a cyclic number.

It is not a de Polignac number, because 21244241123 - 2¹⁸ = 21243978979 is a prime.

It is a super-2 number, since 2×21244241123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21244241092 and 21244241101.

It is not an unprimeable number, because it can be changed into a prime (21244241129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545540 + ... + 583182.

It is an arithmetic number, because the mean of its divisors is an integer number (1559214480).

Almost surely, 2^21244241123 is an apocalyptic number.

21244241123 is a deficient number, since it is larger than the sum of its proper divisors (3703190557).

21244241123 is a wasteful number, since it uses less digits than its factorization.

21244241123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39866.

The product of its digits is 3072, while the sum is 26.

Adding to 21244241123 its reverse (32114244212), we get a palindrome (53358485335).

The spelling of 21244241123 in words is "twenty-one billion, two hundred forty-four million, two hundred forty-one thousand, one hundred twenty-three".