221020122102202 has 4 divisors (see below), whose sum is σ = 331530183153306. Its totient is φ = 110510061051100.

The previous prime is 221020122102167. The next prime is 221020122102287. The reversal of 221020122102202 is 202201221020122.

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., 204341564346481 + 16678557755721 = 14294809^2 + 4083939^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221020122102202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55255030525549 + ... + 55255030525552.

Almost surely, 2^{221020122102202} is an apocalyptic number.

221020122102202 is a deficient number, since it is larger than the sum of its proper divisors (110510061051104).

221020122102202 is a wasteful number, since it uses less digits than its factorization.

221020122102202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110510061051103.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221020122102202 its reverse (202201221020122), we get a palindrome (423221343122324).

The spelling of 221020122102202 in words is "two hundred twenty-one trillion, twenty billion, one hundred twenty-two million, one hundred two thousand, two hundred two".