21483228511 has 2 divisors, whose sum is σ = 21483228512. Its totient is φ = 21483228510.

The previous prime is 21483228497. The next prime is 21483228517. The reversal of 21483228511 is 11582238412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21483228511 - 2⁷ = 21483228383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21483228517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10741614255 + 10741614256.

It is an arithmetic number, because the mean of its divisors is an integer number (10741614256).

Almost surely, 2^21483228511 is an apocalyptic number.

21483228511 is a deficient number, since it is larger than the sum of its proper divisors (1).

21483228511 is an equidigital number, since it uses as much as digits as its factorization.

21483228511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 37.

Subtracting from 21483228511 its reverse (11582238412), we obtain a palindrome (9900990099).

The spelling of 21483228511 in words is "twenty-one billion, four hundred eighty-three million, two hundred twenty-eight thousand, five hundred eleven".