21055130983 has 2 divisors, whose sum is σ = 21055130984. Its totient is φ = 21055130982.

The previous prime is 21055130981. The next prime is 21055131059. The reversal of 21055130983 is 38903155012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21055130983 - 2¹ = 21055130981 is a prime.

It is a super-2 number, since 2×21055130983² (a number of 21 digits) contains 22 as substring.

Together with 21055130981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21055130981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10527565491 + 10527565492.

It is an arithmetic number, because the mean of its divisors is an integer number (10527565492).

Almost surely, 2^21055130983 is an apocalyptic number.

21055130983 is a deficient number, since it is larger than the sum of its proper divisors (1).

21055130983 is an equidigital number, since it uses as much as digits as its factorization.

21055130983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 37.

Adding to 21055130983 its reverse (38903155012), we get a palindrome (59958285995).

The spelling of 21055130983 in words is "twenty-one billion, fifty-five million, one hundred thirty thousand, nine hundred eighty-three".