111022212121021 has 8 divisors (see below), whose sum is σ = 116865713278080. Its totient is φ = 105178733647488.

The previous prime is 111022212120997. The next prime is 111022212121127. The reversal of 111022212121021 is 120121212220111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111022212121021 - 2¹⁹ = 111022211596733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 111022212121021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111022212125021) 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, 4878765 + ... + 15679501.

It is an arithmetic number, because the mean of its divisors is an integer number (14608214159760).

Almost surely, 2^{111022212121021} is an apocalyptic number.

It is an amenable number.

111022212121021 is a deficient number, since it is larger than the sum of its proper divisors (5843501157059).

111022212121021 is a wasteful number, since it uses less digits than its factorization.

111022212121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11341763.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111022212121021 its reverse (120121212220111), we get a palindrome (231143424341132).

The spelling of 111022212121021 in words is "one hundred eleven trillion, twenty-two billion, two hundred twelve million, one hundred twenty-one thousand, twenty-one".