110111101221 has 12 divisors (see below), whose sum is σ = 161374947776. Its totient is φ = 66734000520.

The previous prime is 110111101213. The next prime is 110111101259. The reversal of 110111101221 is 122101111011.

It is not a de Polignac number, because 110111101221 - 2³ = 110111101213 is a prime.

It is a super-2 number, since 2×110111101221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110111101197 and 110111101206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110111109221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151667821 + ... + 151668546.

Almost surely, 2^110111101221 is an apocalyptic number.

110111101221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

110111101221 is a deficient number, since it is larger than the sum of its proper divisors (51263846555).

110111101221 is a wasteful number, since it uses less digits than its factorization.

110111101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303336392 (or 303336381 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 110111101221 its reverse (122101111011), we get a palindrome (232212212232).

The spelling of 110111101221 in words is "one hundred ten billion, one hundred eleven million, one hundred one thousand, two hundred twenty-one".