221110121012011 has 8 divisors (see below), whose sum is σ = 275669761261824. Its totient is φ = 172293600788520.

The previous prime is 221110121011993. The next prime is 221110121012107. The reversal of 221110121012011 is 110210121011122.

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 221110121012011 - 2¹⁷ = 221110120880939 is a prime.

It is a super-2 number, since 2×221110121012011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221110121012111) 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, 1435780006495 + ... + 1435780006648.

It is an arithmetic number, because the mean of its divisors is an integer number (34458720157728).

Almost surely, 2^{221110121012011} is an apocalyptic number.

221110121012011 is a deficient number, since it is larger than the sum of its proper divisors (54559640249813).

221110121012011 is a wasteful number, since it uses less digits than its factorization.

221110121012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871560013161.

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

Adding to 221110121012011 its reverse (110210121011122), we get a palindrome (331320242023133).

The spelling of 221110121012011 in words is "two hundred twenty-one trillion, one hundred ten billion, one hundred twenty-one million, twelve thousand, eleven".