111010221111221 has 4 divisors (see below), whose sum is σ = 111319441783200. Its totient is φ = 110701000439244.

The previous prime is 111010221111169. The next prime is 111010221111269. The reversal of 111010221111221 is 122111122010111.

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 111010221111221 - 2³⁰ = 111009147369397 is a prime.

It is a super-2 number, since 2×111010221111221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111010221111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111010221111421) 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, 154610335451 + ... + 154610336168.

It is an arithmetic number, because the mean of its divisors is an integer number (27829860445800).

Almost surely, 2^{111010221111221} is an apocalyptic number.

It is an amenable number.

111010221111221 is a deficient number, since it is larger than the sum of its proper divisors (309220671979).

111010221111221 is an equidigital number, since it uses as much as digits as its factorization.

111010221111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309220671978.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111010221111221 its reverse (122111122010111), we get a palindrome (233121343121332).

The spelling of 111010221111221 in words is "one hundred eleven trillion, ten billion, two hundred twenty-one million, one hundred eleven thousand, two hundred twenty-one".