1110101111221 has 4 divisors (see below), whose sum is σ = 1110138920992. Its totient is φ = 1110063301452.

The previous prime is 1110101111143. The next prime is 1110101111233. The reversal of 1110101111221 is 1221111010111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1110101111221 - 2¹⁵ = 1110101078453 is a prime.

It is a super-2 number, since 2×1110101111221² (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 (1110101111921) 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, 18860811 + ... + 18919576.

It is an arithmetic number, because the mean of its divisors is an integer number (277534730248).

Almost surely, 2^{1110101111221} is an apocalyptic number.

It is an amenable number.

1110101111221 is a deficient number, since it is larger than the sum of its proper divisors (37809771).

1110101111221 is an equidigital number, since it uses as much as digits as its factorization.

1110101111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37809770.

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

Adding to 1110101111221 its reverse (1221111010111), we get a palindrome (2331212121332).

It can be divided in two parts, 111010111 and 1221, that multiplied together give a palindrome (135543345531).

The spelling of 1110101111221 in words is "one trillion, one hundred ten billion, one hundred one million, one hundred eleven thousand, two hundred twenty-one".