10430221661 has 2 divisors, whose sum is σ = 10430221662. Its totient is φ = 10430221660.

The previous prime is 10430221619. The next prime is 10430221687. The reversal of 10430221661 is 16612203401.

It is an a-pointer prime, because the next prime (10430221687) can be obtained adding 10430221661 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5275843225 + 5154378436 = 72635^2 + 71794^2 .

It is a cyclic number.

It is not a de Polignac number, because 10430221661 - 2¹⁴ = 10430205277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10430221661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10430221961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5215110830 + 5215110831.

It is an arithmetic number, because the mean of its divisors is an integer number (5215110831).

Almost surely, 2^10430221661 is an apocalyptic number.

It is an amenable number.

10430221661 is a deficient number, since it is larger than the sum of its proper divisors (1).

10430221661 is an equidigital number, since it uses as much as digits as its factorization.

10430221661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 10430221661 in words is "ten billion, four hundred thirty million, two hundred twenty-one thousand, six hundred sixty-one".