21260543110007 has 2 divisors, whose sum is σ = 21260543110008. Its totient is φ = 21260543110006.

The previous prime is 21260543109977. The next prime is 21260543110033. The reversal of 21260543110007 is 70001134506212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21260543110007 - 2²⁰ = 21260542061431 is a prime.

It is a super-2 number, since 2×21260543110007² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21260543110067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10630271555003 + 10630271555004.

It is an arithmetic number, because the mean of its divisors is an integer number (10630271555004).

Almost surely, 2^{21260543110007} is an apocalyptic number.

21260543110007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21260543110007 is an equidigital number, since it uses as much as digits as its factorization.

21260543110007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 21260543110007 its reverse (70001134506212), we get a palindrome (91261677616219).

The spelling of 21260543110007 in words is "twenty-one trillion, two hundred sixty billion, five hundred forty-three million, one hundred ten thousand, seven".