111010111222021 has 8 divisors (see below), whose sum is σ = 123678576526464. Its totient is φ = 98771085419520.

The previous prime is 111010111222013. The next prime is 111010111222121. The reversal of 111010111222021 is 120222111010111.

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 111010111222021 - 2³ = 111010111222013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111010111221986 and 111010111222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111010111222121) 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, 107359874940 + ... + 107359875973.

It is an arithmetic number, because the mean of its divisors is an integer number (15459822065808).

Almost surely, 2^{111010111222021} is an apocalyptic number.

111010111222021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111010111222021 is a deficient number, since it is larger than the sum of its proper divisors (12668465304443).

111010111222021 is a wasteful number, since it uses less digits than its factorization.

111010111222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214719750971.

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

Adding to 111010111222021 its reverse (120222111010111), we get a palindrome (231232222232132).

The spelling of 111010111222021 in words is "one hundred eleven trillion, ten billion, one hundred eleven million, two hundred twenty-two thousand, twenty-one".