221072016026 has 4 divisors (see below), whose sum is σ = 331608024042. Its totient is φ = 110536008012.

The previous prime is 221072016023. The next prime is 221072016037. The reversal of 221072016026 is 620610270122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 118508751001 + 102563265025 = 344251^2 + 320255^2 .

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 221072016026.

It is not an unprimeable number, because it can be changed into a prime (221072016023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55268004005 + ... + 55268004008.

Almost surely, 2^221072016026 is an apocalyptic number.

221072016026 is a deficient number, since it is larger than the sum of its proper divisors (110536008016).

221072016026 is a wasteful number, since it uses less digits than its factorization.

221072016026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110536008015.

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

Adding to 221072016026 its reverse (620610270122), we get a palindrome (841682286148).

The spelling of 221072016026 in words is "two hundred twenty-one billion, seventy-two million, sixteen thousand, twenty-six".