221766242667122 has 16 divisors (see below), whose sum is σ = 352217396063160. Its totient is φ = 104360459624448.

The previous prime is 221766242667113. The next prime is 221766242667127.

221766242667122 is nontrivially palindromic in base 10.

221766242667122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 160381227117241 + 61385015549881 = 12664171^2 + 7834859^2 .

It is not an unprimeable number, because it can be changed into a prime (221766242667127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28826798 + ... + 35700374.

Almost surely, 2^{221766242667122} is an apocalyptic number.

221766242667122 is a deficient number, since it is larger than the sum of its proper divisors (130451153396038).

221766242667122 is a wasteful number, since it uses less digits than its factorization.

221766242667122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7822525.

The product of its digits is 16257024, while the sum is 56.

The spelling of 221766242667122 in words is "two hundred twenty-one trillion, seven hundred sixty-six billion, two hundred forty-two million, six hundred sixty-seven thousand, one hundred twenty-two".