111021011011221 has 16 divisors (see below), whose sum is σ = 150060931151040. Its totient is φ = 72997618504320.

The previous prime is 111021011011171. The next prime is 111021011011223. The reversal of 111021011011221 is 122110110120111.

It is not a de Polignac number, because 111021011011221 - 2⁹ = 111021011010709 is a prime.

It is a super-3 number, since 3×111021011011221³ (a number of 43 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111021011011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021011011223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2250195 + ... + 15070016.

It is an arithmetic number, because the mean of its divisors is an integer number (9378808196940).

Almost surely, 2^{111021011011221} is an apocalyptic number.

It is an amenable number.

111021011011221 is a deficient number, since it is larger than the sum of its proper divisors (39039920139819).

111021011011221 is a wasteful number, since it uses less digits than its factorization.

111021011011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17349556.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 111021011011221 its reverse (122110110120111), we get a palindrome (233131121131332).

The spelling of 111021011011221 in words is "one hundred eleven trillion, twenty-one billion, eleven million, eleven thousand, two hundred twenty-one".