21055242283 has 2 divisors, whose sum is σ = 21055242284. Its totient is φ = 21055242282.

The previous prime is 21055242259. The next prime is 21055242317. The reversal of 21055242283 is 38224255012.

It is an a-pointer prime, because the next prime (21055242317) can be obtained adding 21055242283 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21055242283 - 2¹⁷ = 21055111211 is a prime.

It is not a weakly prime, because it can be changed into another prime (21055242233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10527621141 + 10527621142.

It is an arithmetic number, because the mean of its divisors is an integer number (10527621142).

Almost surely, 2^21055242283 is an apocalyptic number.

21055242283 is a deficient number, since it is larger than the sum of its proper divisors (1).

21055242283 is an equidigital number, since it uses as much as digits as its factorization.

21055242283 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 21055242283 its reverse (38224255012), we get a palindrome (59279497295).

The spelling of 21055242283 in words is "twenty-one billion, fifty-five million, two hundred forty-two thousand, two hundred eighty-three".