21725253527011 has 2 divisors, whose sum is σ = 21725253527012. Its totient is φ = 21725253527010.

The previous prime is 21725253526997. The next prime is 21725253527041. The reversal of 21725253527011 is 11072535252712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21725253527011 - 2⁹ = 21725253526499 is a prime.

It is not a weakly prime, because it can be changed into another prime (21725253527041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10862626763505 + 10862626763506.

It is an arithmetic number, because the mean of its divisors is an integer number (10862626763506).

Almost surely, 2^{21725253527011} is an apocalyptic number.

21725253527011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21725253527011 is an equidigital number, since it uses as much as digits as its factorization.

21725253527011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 294000, while the sum is 43.

Adding to 21725253527011 its reverse (11072535252712), we get a palindrome (32797788779723).

The spelling of 21725253527011 in words is "twenty-one trillion, seven hundred twenty-five billion, two hundred fifty-three million, five hundred twenty-seven thousand, eleven".