221110012011 has 16 divisors (see below), whose sum is σ = 341958343424. Its totient is φ = 124462777824.

The previous prime is 221110011949. The next prime is 221110012031. The reversal of 221110012011 is 110210011122.

It is not a de Polignac number, because 221110012011 - 2⁷ = 221110011883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221110012031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78573580 + ... + 78576393.

It is an arithmetic number, because the mean of its divisors is an integer number (21372396464).

Almost surely, 2^221110012011 is an apocalyptic number.

221110012011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221110012011 is a deficient number, since it is larger than the sum of its proper divisors (120848331413).

221110012011 is a wasteful number, since it uses less digits than its factorization.

221110012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157150050.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 221110012011 its reverse (110210011122), we get a palindrome (331320023133).

The spelling of 221110012011 in words is "two hundred twenty-one billion, one hundred ten million, twelve thousand, eleven".