221121021110 has 16 divisors (see below), whose sum is σ = 434201278032. Its totient is φ = 80407644000.

The previous prime is 221121021083. The next prime is 221121021131. The reversal of 221121021110 is 11120121122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1005095441 + ... + 1005095660.

It is an arithmetic number, because the mean of its divisors is an integer number (27137579877).

Almost surely, 2^221121021110 is an apocalyptic number.

221121021110 is a deficient number, since it is larger than the sum of its proper divisors (213080256922).

221121021110 is a wasteful number, since it uses less digits than its factorization.

221121021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010191119.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221121021110 its reverse (11120121122), we get a palindrome (232241142232).

The spelling of 221121021110 in words is "two hundred twenty-one billion, one hundred twenty-one million, twenty-one thousand, one hundred ten".