1110110111221 has 12 divisors (see below), whose sum is σ = 1171784897472. Its totient is φ = 1051528115304.

The previous prime is 1110110111153. The next prime is 1110110111239. The reversal of 1110110111221 is 1221110110111.

It is not a de Polignac number, because 1110110111221 - 2³³ = 1101520176629 is a prime.

It is a super-2 number, since 2×1110110111221² (a number of 25 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 (1110110114221) 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, 2261380 + ... + 2708146.

It is an arithmetic number, because the mean of its divisors is an integer number (97648741456).

Almost surely, 2^{1110110111221} is an apocalyptic number.

It is an amenable number.

1110110111221 is a deficient number, since it is larger than the sum of its proper divisors (61674786251).

1110110111221 is an equidigital number, since it uses as much as digits as its factorization.

1110110111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453688 (or 453669 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1110110111221 its reverse (1221110110111), we get a palindrome (2331220221332).

The spelling of 1110110111221 in words is "one trillion, one hundred ten billion, one hundred ten million, one hundred eleven thousand, two hundred twenty-one".