111221111122021 has 8 divisors (see below), whose sum is σ = 111270764743424. Its totient is φ = 111171458398320.

The previous prime is 111221111122007. The next prime is 111221111122081. The reversal of 111221111122021 is 120221111122111.

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 111221111122021 - 2²⁷ = 111220976904293 is a prime.

It is a super-3 number, since 3×111221111122021³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 111221111122021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221111122081) 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, 430538131 + ... + 430796383.

It is an arithmetic number, because the mean of its divisors is an integer number (13908845592928).

Almost surely, 2^{111221111122021} is an apocalyptic number.

It is an amenable number.

111221111122021 is a deficient number, since it is larger than the sum of its proper divisors (49653621403).

111221111122021 is a wasteful number, since it uses less digits than its factorization.

111221111122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448851.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 111221111122021 its reverse (120221111122111), we get a palindrome (231442222244132).

The spelling of 111221111122021 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred eleven million, one hundred twenty-two thousand, twenty-one".