221100020006 has 4 divisors (see below), whose sum is σ = 331650030012. Its totient is φ = 110550010002.

The previous prime is 221100019999. The next prime is 221100020017. The reversal of 221100020006 is 600020001122.

221100020006 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 is a semiprime because it is the product of two primes.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 55275005000 + ... + 55275005003.

It is an arithmetic number, because the mean of its divisors is an integer number (82912507503).

Almost surely, 2^221100020006 is an apocalyptic number.

221100020006 is a deficient number, since it is larger than the sum of its proper divisors (110550010006).

221100020006 is a wasteful number, since it uses less digits than its factorization.

221100020006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110550010005.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 221100020006 its reverse (600020001122), we get a palindrome (821120021128).

The spelling of 221100020006 in words is "two hundred twenty-one billion, one hundred million, twenty thousand, six".