21483011971 has 2 divisors, whose sum is σ = 21483011972. Its totient is φ = 21483011970.

The previous prime is 21483011969. The next prime is 21483012029. The reversal of 21483011971 is 17911038412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21483011971 - 2¹ = 21483011969 is a prime.

It is a super-3 number, since 3×21483011971³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 21483011969, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21483011971.

It is not a weakly prime, because it can be changed into another prime (21483011951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10741505985 + 10741505986.

It is an arithmetic number, because the mean of its divisors is an integer number (10741505986).

Almost surely, 2^21483011971 is an apocalyptic number.

21483011971 is a deficient number, since it is larger than the sum of its proper divisors (1).

21483011971 is an equidigital number, since it uses as much as digits as its factorization.

21483011971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 37.

It can be divided in two parts, 214830 and 11971, that added together give a triangular number (226801 = T₆₇₃).

The spelling of 21483011971 in words is "twenty-one billion, four hundred eighty-three million, eleven thousand, nine hundred seventy-one".