21062135441 has 2 divisors, whose sum is σ = 21062135442. Its totient is φ = 21062135440.

The previous prime is 21062135407. The next prime is 21062135443. The reversal of 21062135441 is 14453126012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20908003216 + 154132225 = 144596^2 + 12415^2 .

It is a cyclic number.

It is not a de Polignac number, because 21062135441 - 2⁶ = 21062135377 is a prime.

It is a super-2 number, since 2×21062135441² (a number of 21 digits) contains 22 as substring.

Together with 21062135443, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21062135443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10531067720 + 10531067721.

It is an arithmetic number, because the mean of its divisors is an integer number (10531067721).

Almost surely, 2^21062135441 is an apocalyptic number.

It is an amenable number.

21062135441 is a deficient number, since it is larger than the sum of its proper divisors (1).

21062135441 is an equidigital number, since it uses as much as digits as its factorization.

21062135441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 21062135441 in words is "twenty-one billion, sixty-two million, one hundred thirty-five thousand, four hundred forty-one".