21353451127 has 2 divisors, whose sum is σ = 21353451128. Its totient is φ = 21353451126.

The previous prime is 21353451101. The next prime is 21353451149. The reversal of 21353451127 is 72115435312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21353451127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21353451092 and 21353451101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21353451167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10676725563 + 10676725564.

It is an arithmetic number, because the mean of its divisors is an integer number (10676725564).

Almost surely, 2^21353451127 is an apocalyptic number.

21353451127 is a deficient number, since it is larger than the sum of its proper divisors (1).

21353451127 is an equidigital number, since it uses as much as digits as its factorization.

21353451127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 34.

Adding to 21353451127 its reverse (72115435312), we get a palindrome (93468886439).

The spelling of 21353451127 in words is "twenty-one billion, three hundred fifty-three million, four hundred fifty-one thousand, one hundred twenty-seven".