221110122210202 has 4 divisors (see below), whose sum is σ = 331665183315306. Its totient is φ = 110555061105100.

The previous prime is 221110122210167. The next prime is 221110122210221. The reversal of 221110122210202 is 202012221011122.

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., 220993466490801 + 116655719401 = 14865849^2 + 341549^2 .

It is a super-3 number, since 3×221110122210202³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 221110122210202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55277530552549 + ... + 55277530552552.

Almost surely, 2^{221110122210202} is an apocalyptic number.

221110122210202 is a deficient number, since it is larger than the sum of its proper divisors (110555061105104).

221110122210202 is a wasteful number, since it uses less digits than its factorization.

221110122210202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110555061105103.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221110122210202 its reverse (202012221011122), we get a palindrome (423122343221324).

The spelling of 221110122210202 in words is "two hundred twenty-one trillion, one hundred ten billion, one hundred twenty-two million, two hundred ten thousand, two hundred two".