221020111120111 has 8 divisors (see below), whose sum is σ = 221465158128000. Its totient is φ = 220575072596952.

The previous prime is 221020111120091. The next prime is 221020111120219. The reversal of 221020111120111 is 111021111020122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221020111120111 - 2¹⁵ = 221020111087343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020111127111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51387006 + ... + 55521748.

It is an arithmetic number, because the mean of its divisors is an integer number (27683144766000).

Almost surely, 2^{221020111120111} is an apocalyptic number.

221020111120111 is a deficient number, since it is larger than the sum of its proper divisors (445047007889).

221020111120111 is a wasteful number, since it uses less digits than its factorization.

221020111120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4242365.

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

Adding to 221020111120111 its reverse (111021111020122), we get a palindrome (332041222140233).

The spelling of 221020111120111 in words is "two hundred twenty-one trillion, twenty billion, one hundred eleven million, one hundred twenty thousand, one hundred eleven".