221000002122 has 8 divisors (see below), whose sum is σ = 442000004256. Its totient is φ = 73666667372.

The previous prime is 221000002061. The next prime is 221000002163. The reversal of 221000002122 is 221200000122.

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

221000002122 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 221000002098 and 221000002107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18416666838 + ... + 18416666849.

It is an arithmetic number, because the mean of its divisors is an integer number (55250000532).

Almost surely, 2^221000002122 is an apocalyptic number.

221000002122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221000002122 is a wasteful number, since it uses less digits than its factorization.

221000002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36833333692.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 221000002122 its reverse (221200000122), we get a palindrome (442200002244).

The spelling of 221000002122 in words is "two hundred twenty-one billion, two thousand, one hundred twenty-two".