221121112121110 has 96 divisors (see below), whose sum is σ = 420019474533120. Its totient is φ = 83801125831104.

The previous prime is 221121112121101. The next prime is 221121112121159. The reversal of 221121112121110 is 11121211121122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5229530029 + ... + 5229572311.

It is an arithmetic number, because the mean of its divisors is an integer number (4375202859720).

Almost surely, 2^{221121112121110} is an apocalyptic number.

221121112121110 is a deficient number, since it is larger than the sum of its proper divisors (198898362412010).

221121112121110 is a wasteful number, since it uses less digits than its factorization.

221121112121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51682 (or 51659 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 221121112121110 its reverse (11121211121122), we get a palindrome (232242323242232).

The spelling of 221121112121110 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, one hundred twelve million, one hundred twenty-one thousand, one hundred ten".