21020461134241 has 2 divisors, whose sum is σ = 21020461134242. Its totient is φ = 21020461134240.

The previous prime is 21020461134227. The next prime is 21020461134259. The reversal of 21020461134241 is 14243116402012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10848163259025 + 10172297875216 = 3293655^2 + 3189404^2 .

It is a cyclic number.

It is not a de Polignac number, because 21020461134241 - 2¹⁵ = 21020461101473 is a prime.

It is a super-2 number, since 2×21020461134241² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21020461174241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510230567120 + 10510230567121.

It is an arithmetic number, because the mean of its divisors is an integer number (10510230567121).

Almost surely, 2^{21020461134241} is an apocalyptic number.

It is an amenable number.

21020461134241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020461134241 is an equidigital number, since it uses as much as digits as its factorization.

21020461134241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 21020461134241 its reverse (14243116402012), we get a palindrome (35263577536253).

The spelling of 21020461134241 in words is "twenty-one trillion, twenty billion, four hundred sixty-one million, one hundred thirty-four thousand, two hundred forty-one".