221011221122 has 8 divisors (see below), whose sum is σ = 351017821836. Its totient is φ = 104005280512.

The previous prime is 221011221073. The next prime is 221011221157. The reversal of 221011221122 is 221122110122.

221011221122 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 177880654081 + 43130567041 = 421759^2 + 207679^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (17).

221011221122 is a modest number, since divided by 11221122 gives 2210 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 221011221122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3250164983 + ... + 3250165050.

Almost surely, 2^221011221122 is an apocalyptic number.

221011221122 is a deficient number, since it is larger than the sum of its proper divisors (130006600714).

221011221122 is a wasteful number, since it uses less digits than its factorization.

221011221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6500330052.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221011221122 its reverse (221122110122), we get a palindrome (442133331244).

The spelling of 221011221122 in words is "two hundred twenty-one billion, eleven million, two hundred twenty-one thousand, one hundred twenty-two".