10721420461 has 2 divisors, whose sum is σ = 10721420462. Its totient is φ = 10721420460.

The previous prime is 10721420443. The next prime is 10721420473. The reversal of 10721420461 is 16402412701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9352050436 + 1369370025 = 96706^2 + 37005^2 .

It is a cyclic number.

It is not a de Polignac number, because 10721420461 - 2¹¹ = 10721418413 is a prime.

It is a super-2 number, since 2×10721420461² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10721420561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5360710230 + 5360710231.

It is an arithmetic number, because the mean of its divisors is an integer number (5360710231).

Almost surely, 2^10721420461 is an apocalyptic number.

It is an amenable number.

10721420461 is a deficient number, since it is larger than the sum of its proper divisors (1).

10721420461 is an equidigital number, since it uses as much as digits as its factorization.

10721420461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The spelling of 10721420461 in words is "ten billion, seven hundred twenty-one million, four hundred twenty thousand, four hundred sixty-one".