10221404566 has 4 divisors (see below), whose sum is σ = 15332106852. Its totient is φ = 5110702282.

The previous prime is 10221404563. The next prime is 10221404579. The reversal of 10221404566 is 66540412201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66540412201 = 3823 ⋅17405287.

It is a super-2 number, since 2×10221404566² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221404563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2555351140 + ... + 2555351143.

It is an arithmetic number, because the mean of its divisors is an integer number (3833026713).

Almost surely, 2^10221404566 is an apocalyptic number.

10221404566 is a deficient number, since it is larger than the sum of its proper divisors (5110702286).

10221404566 is an equidigital number, since it uses as much as digits as its factorization.

10221404566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5110702285.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 10221404566 its reverse (66540412201), we get a palindrome (76761816767).

The spelling of 10221404566 in words is "ten billion, two hundred twenty-one million, four hundred four thousand, five hundred sixty-six".