221201110012122 has 24 divisors (see below), whose sum is σ = 492222289848276. Its totient is φ = 71740900544256.

The previous prime is 221201110012073. The next prime is 221201110012139. The reversal of 221201110012122 is 221210011102122.

221201110012122 is a `hidden beast` number, since 221 + 201 + 1 + 100 + 121 + 22 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 217048648270041 + 4152461742081 = 14732571^2 + 2037759^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221201110012095 and 221201110012104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166066898743 + ... + 166066900074.

Almost surely, 2^{221201110012122} is an apocalyptic number.

221201110012122 is an abundant number, since it is smaller than the sum of its proper divisors (271021179836154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221201110012122 is a wasteful number, since it uses less digits than its factorization.

221201110012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332133798862 (or 332133798859 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221201110012122 its reverse (221210011102122), we get a palindrome (442411121114244).

The spelling of 221201110012122 in words is "two hundred twenty-one trillion, two hundred one billion, one hundred ten million, twelve thousand, one hundred twenty-two".