111020211201221 has 8 divisors (see below), whose sum is σ = 127411121045760. Its totient is φ = 94762021274928.

The previous prime is 111020211201173. The next prime is 111020211201227. The reversal of 111020211201221 is 122102112020111.

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

It is not a de Polignac number, because 111020211201221 - 2¹⁴ = 111020211184837 is a prime.

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 111020211201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020211201227) 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, 33179977766 + ... + 33179981111.

It is an arithmetic number, because the mean of its divisors is an integer number (15926390130720).

Almost surely, 2^{111020211201221} is an apocalyptic number.

It is an amenable number.

111020211201221 is a deficient number, since it is larger than the sum of its proper divisors (16390909844539).

111020211201221 is an equidigital number, since it uses as much as digits as its factorization.

111020211201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66359959123.

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

Adding to 111020211201221 its reverse (122102112020111), we get a palindrome (233122323221332).

The spelling of 111020211201221 in words is "one hundred eleven trillion, twenty billion, two hundred eleven million, two hundred one thousand, two hundred twenty-one".