21061034741 has 2 divisors, whose sum is σ = 21061034742. Its totient is φ = 21061034740.

The previous prime is 21061034717. The next prime is 21061034777. The reversal of 21061034741 is 14743016012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12355211716 + 8705823025 = 111154^2 + 93305^2 .

It is a cyclic number.

It is not a de Polignac number, because 21061034741 - 2¹⁰ = 21061033717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21061034041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10530517370 + 10530517371.

It is an arithmetic number, because the mean of its divisors is an integer number (10530517371).

Almost surely, 2^21061034741 is an apocalyptic number.

It is an amenable number.

21061034741 is a deficient number, since it is larger than the sum of its proper divisors (1).

21061034741 is an equidigital number, since it uses as much as digits as its factorization.

21061034741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The spelling of 21061034741 in words is "twenty-one billion, sixty-one million, thirty-four thousand, seven hundred forty-one".