111012211020221 has 16 divisors (see below), whose sum is σ = 135638318709504. Its totient is φ = 88686592982784.

The previous prime is 111012211020199. The next prime is 111012211020223. The reversal of 111012211020221 is 122020112210111.

It is not a de Polignac number, because 111012211020221 - 2⁶ = 111012211020157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 111012211020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012211020223) 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, 4528510670 + ... + 4528535183.

It is an arithmetic number, because the mean of its divisors is an integer number (8477394919344).

Almost surely, 2^{111012211020221} is an apocalyptic number.

It is an amenable number.

111012211020221 is a deficient number, since it is larger than the sum of its proper divisors (24626107689283).

111012211020221 is a wasteful number, since it uses less digits than its factorization.

111012211020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9057045980.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111012211020221 its reverse (122020112210111), we get a palindrome (233032323230332).

The spelling of 111012211020221 in words is "one hundred eleven trillion, twelve billion, two hundred eleven million, twenty thousand, two hundred twenty-one".