111021110001221 has 8 divisors (see below), whose sum is σ = 128668328694144. Its totient is φ = 93820656338640.

The previous prime is 111021110001199. The next prime is 111021110001271. The reversal of 111021110001221 is 122100011120111.

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

It is not a de Polignac number, because 111021110001221 - 2¹⁰ = 111021110000197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111021110001196 and 111021110001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021110001271) 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, 111691257050 + ... + 111691258043.

It is an arithmetic number, because the mean of its divisors is an integer number (16083541086768).

Almost surely, 2^{111021110001221} is an apocalyptic number.

It is an amenable number.

111021110001221 is a deficient number, since it is larger than the sum of its proper divisors (17647218692923).

111021110001221 is an equidigital number, since it uses as much as digits as its factorization.

111021110001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223382515171.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111021110001221 its reverse (122100011120111), we get a palindrome (233121121121332).

The spelling of 111021110001221 in words is "one hundred eleven trillion, twenty-one billion, one hundred ten million, one thousand, two hundred twenty-one".