21130411013 has 2 divisors, whose sum is σ = 21130411014. Its totient is φ = 21130411012.

The previous prime is 21130411007. The next prime is 21130411037. The reversal of 21130411013 is 31011403112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21046175329 + 84235684 = 145073^2 + 9178^2 .

It is a cyclic number.

It is not a de Polignac number, because 21130411013 - 2²⁶ = 21063302149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21130410982 and 21130411000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21130411063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565205506 + 10565205507.

It is an arithmetic number, because the mean of its divisors is an integer number (10565205507).

Almost surely, 2^21130411013 is an apocalyptic number.

It is an amenable number.

21130411013 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130411013 is an equidigital number, since it uses as much as digits as its factorization.

21130411013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21130411013 its reverse (31011403112), we get a palindrome (52141814125).

The spelling of 21130411013 in words is "twenty-one billion, one hundred thirty million, four hundred eleven thousand, thirteen".