21441120049 has 2 divisors, whose sum is σ = 21441120050. Its totient is φ = 21441120048.

The previous prime is 21441120013. The next prime is 21441120061. The reversal of 21441120049 is 94002114412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20454720400 + 986399649 = 143020^2 + 31407^2 .

It is a cyclic number.

It is not a de Polignac number, because 21441120049 - 2¹¹ = 21441118001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21441119999 and 21441120026.

It is not a weakly prime, because it can be changed into another prime (21441121049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10720560024 + 10720560025.

It is an arithmetic number, because the mean of its divisors is an integer number (10720560025).

Almost surely, 2^21441120049 is an apocalyptic number.

It is an amenable number.

21441120049 is a deficient number, since it is larger than the sum of its proper divisors (1).

21441120049 is an equidigital number, since it uses as much as digits as its factorization.

21441120049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 21441120049 in words is "twenty-one billion, four hundred forty-one million, one hundred twenty thousand, forty-nine".