221200221122 has 4 divisors (see below), whose sum is σ = 331800331686. Its totient is φ = 110600110560.

The previous prime is 221200221059. The next prime is 221200221139. The reversal of 221200221122 is 221122002122.

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., 211150359121 + 10049862001 = 459511^2 + 100249^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221200221122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55300055279 + ... + 55300055282.

Almost surely, 2^221200221122 is an apocalyptic number.

221200221122 is a deficient number, since it is larger than the sum of its proper divisors (110600110564).

221200221122 is a wasteful number, since it uses less digits than its factorization.

221200221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110600110563.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221200221122 its reverse (221122002122), we get a palindrome (442322223244).

The spelling of 221200221122 in words is "two hundred twenty-one billion, two hundred million, two hundred twenty-one thousand, one hundred twenty-two".