221000022002 has 4 divisors (see below), whose sum is σ = 331500033006. Its totient is φ = 110500011000.

The previous prime is 221000021993. The next prime is 221000022017. The reversal of 221000022002 is 200220000122.

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., 211608280081 + 9391741921 = 460009^2 + 96911^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55250005499 + ... + 55250005502.

Almost surely, 2^221000022002 is an apocalyptic number.

221000022002 is a deficient number, since it is larger than the sum of its proper divisors (110500011004).

221000022002 is a wasteful number, since it uses less digits than its factorization.

221000022002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110500011003.

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 221000022002 its reverse (200220000122), we get a palindrome (421220022124).

The spelling of 221000022002 in words is "two hundred twenty-one billion, twenty-two thousand, two".