221021001110 has 64 divisors (see below), whose sum is σ = 491058312192. Its totient is φ = 69747820416.

The previous prime is 221021001101. The next prime is 221021001133. The reversal of 221021001110 is 11100120122.

It is a junction number, because it is equal to n+sod(n) for n = 221021001091 and 221021001100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34202 + ... + 665741.

It is an arithmetic number, because the mean of its divisors is an integer number (7672786128).

Almost surely, 2^221021001110 is an apocalyptic number.

221021001110 is an abundant number, since it is smaller than the sum of its proper divisors (270037311082).

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

221021001110 is a wasteful number, since it uses less digits than its factorization.

221021001110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700317.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 221021001110 its reverse (11100120122), we get a palindrome (232121121232).

The spelling of 221021001110 in words is "two hundred twenty-one billion, twenty-one million, one thousand, one hundred ten".