111221122022021 has 8 divisors (see below), whose sum is σ = 121336025208384. Its totient is φ = 101106867517920.

The previous prime is 111221122022011. The next prime is 111221122022039. The reversal of 111221122022021 is 120220221122111.

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

It is not a de Polignac number, because 111221122022021 - 2⁴² = 106823075510917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111221122021984 and 111221122022002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221122022011) 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, 161812025 + ... + 162497918.

It is an arithmetic number, because the mean of its divisors is an integer number (15167003151048).

Almost surely, 2^{111221122022021} is an apocalyptic number.

111221122022021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111221122022021 is a deficient number, since it is larger than the sum of its proper divisors (10114903186363).

111221122022021 is a wasteful number, since it uses less digits than its factorization.

111221122022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324341131.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 111221122022021 its reverse (120220221122111), we get a palindrome (231441343144132).

The spelling of 111221122022021 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred twenty-two million, twenty-two thousand, twenty-one".