111010121111221 has 8 divisors (see below), whose sum is σ = 111569804395200. Its totient is φ = 110450456262432.

The previous prime is 111010121111207. The next prime is 111010121111233. The reversal of 111010121111221 is 122111121010111.

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 111010121111221 - 2⁷ = 111010121111093 is a prime.

It is a super-2 number, since 2×111010121111221² (a number of 29 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 = 111010121111195 and 111010121111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111010121811221) 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, 7545441 + ... + 16701913.

It is an arithmetic number, because the mean of its divisors is an integer number (13946225549400).

Almost surely, 2^{111010121111221} is an apocalyptic number.

It is an amenable number.

111010121111221 is a deficient number, since it is larger than the sum of its proper divisors (559683283979).

111010121111221 is an equidigital number, since it uses as much as digits as its factorization.

111010121111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9217595.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 111010121111221 its reverse (122111121010111), we get a palindrome (233121242121332).

The spelling of 111010121111221 in words is "one hundred eleven trillion, ten billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-one".