21095529061 has 2 divisors, whose sum is σ = 21095529062. Its totient is φ = 21095529060.

The previous prime is 21095528989. The next prime is 21095529071. The reversal of 21095529061 is 16092559012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16408072836 + 4687456225 = 128094^2 + 68465^2 .

It is a cyclic number.

It is not a de Polignac number, because 21095529061 - 2⁷ = 21095528933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21095529071) 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, 10547764530 + 10547764531.

It is an arithmetic number, because the mean of its divisors is an integer number (10547764531).

Almost surely, 2^21095529061 is an apocalyptic number.

It is an amenable number.

21095529061 is a deficient number, since it is larger than the sum of its proper divisors (1).

21095529061 is an equidigital number, since it uses as much as digits as its factorization.

21095529061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 40.

The spelling of 21095529061 in words is "twenty-one billion, ninety-five million, five hundred twenty-nine thousand, sixty-one".