21322144241 has 4 divisors (see below), whose sum is σ = 21322797300. Its totient is φ = 21321491184.

The previous prime is 21322144231. The next prime is 21322144267. The reversal of 21322144241 is 14244122312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9090669025 + 12231475216 = 95345^2 + 110596^2 .

It is a cyclic number.

It is not a de Polignac number, because 21322144241 - 2¹⁸ = 21321882097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21322144241.

It is not an unprimeable number, because it can be changed into a prime (21322144201) 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, 274826 + ... + 343763.

It is an arithmetic number, because the mean of its divisors is an integer number (5330699325).

Almost surely, 2^21322144241 is an apocalyptic number.

It is an amenable number.

21322144241 is a deficient number, since it is larger than the sum of its proper divisors (653059).

21322144241 is an equidigital number, since it uses as much as digits as its factorization.

21322144241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653058.

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

Adding to 21322144241 its reverse (14244122312), we get a palindrome (35566266553).

The spelling of 21322144241 in words is "twenty-one billion, three hundred twenty-two million, one hundred forty-four thousand, two hundred forty-one".