21020461134227 has 2 divisors, whose sum is σ = 21020461134228. Its totient is φ = 21020461134226.

The previous prime is 21020461134143. The next prime is 21020461134241. The reversal of 21020461134227 is 72243116402012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21020461134227 is a prime.

It is not a weakly prime, because it can be changed into another prime (21020461334227) 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, 10510230567113 + 10510230567114.

It is an arithmetic number, because the mean of its divisors is an integer number (10510230567114).

Almost surely, 2^{21020461134227} is an apocalyptic number.

21020461134227 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020461134227 is an equidigital number, since it uses as much as digits as its factorization.

21020461134227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

Adding to 21020461134227 its reverse (72243116402012), we get a palindrome (93263577536239).

The spelling of 21020461134227 in words is "twenty-one trillion, twenty billion, four hundred sixty-one million, one hundred thirty-four thousand, two hundred twenty-seven".