111020211022221 has 48 divisors (see below), whose sum is σ = 162927810339840. Its totient is φ = 72838954800000.

The previous prime is 111020211022181. The next prime is 111020211022247. The reversal of 111020211022221 is 122220112020111.

111020211022221 is a `hidden beast` number, since 1 + 110 + 202 + 110 + 22 + 221 = 666.

It is not a de Polignac number, because 111020211022221 - 2¹⁰ = 111020211021197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111020211022194 and 111020211022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020211022261) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 218332371 + ... + 218840271.

It is an arithmetic number, because the mean of its divisors is an integer number (3394329382080).

Almost surely, 2^{111020211022221} is an apocalyptic number.

It is an amenable number.

111020211022221 is a deficient number, since it is larger than the sum of its proper divisors (51907599317619).

111020211022221 is a wasteful number, since it uses less digits than its factorization.

111020211022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509458 (or 509455 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 111020211022221 its reverse (122220112020111), we get a palindrome (233240323042332).

The spelling of 111020211022221 in words is "one hundred eleven trillion, twenty billion, two hundred eleven million, twenty-two thousand, two hundred twenty-one".