221022201022111 has 4 divisors (see below), whose sum is σ = 228643656229800. Its totient is φ = 213400745814424.

The previous prime is 221022201022093. The next prime is 221022201022153. The reversal of 221022201022111 is 111220102220122.

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

It is a cyclic number.

It is not a de Polignac number, because 221022201022111 - 2¹⁹ = 221022200497823 is a prime.

It is a super-2 number, since 2×221022201022111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022201032111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3810727603801 + ... + 3810727603858.

It is an arithmetic number, because the mean of its divisors is an integer number (57160914057450).

Almost surely, 2^{221022201022111} is an apocalyptic number.

221022201022111 is a deficient number, since it is larger than the sum of its proper divisors (7621455207689).

221022201022111 is an equidigital number, since it uses as much as digits as its factorization.

221022201022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7621455207688.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221022201022111 its reverse (111220102220122), we get a palindrome (332242303242233).

The spelling of 221022201022111 in words is "two hundred twenty-one trillion, twenty-two billion, two hundred one million, twenty-two thousand, one hundred eleven".