221022405073 has 4 divisors (see below), whose sum is σ = 221023473520. Its totient is φ = 221021336628.

The previous prime is 221022405053. The next prime is 221022405143. The reversal of 221022405073 is 370504220122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 370504220122 = 2 ⋅185252110061.

It is a cyclic number.

It is not a de Polignac number, because 221022405073 - 2⁵ = 221022405041 is a prime.

It is a super-2 number, since 2×221022405073² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221022405053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113463 + ... + 674476.

It is an arithmetic number, because the mean of its divisors is an integer number (55255868380).

Almost surely, 2^221022405073 is an apocalyptic number.

It is an amenable number.

221022405073 is a deficient number, since it is larger than the sum of its proper divisors (1068447).

221022405073 is an equidigital number, since it uses as much as digits as its factorization.

221022405073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068446.

The product of its (nonzero) digits is 6720, while the sum is 28.

Adding to 221022405073 its reverse (370504220122), we get a palindrome (591526625195).

The spelling of 221022405073 in words is "two hundred twenty-one billion, twenty-two million, four hundred five thousand, seventy-three".