111020211121 has 8 divisors (see below), whose sum is σ = 112947849000. Its totient is φ = 109096045440.

The previous prime is 111020211119. The next prime is 111020211161. The reversal of 111020211121 is 121112020111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14214600625 + 96805610496 = 119225^2 + 311136^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 111020211121 - 2¹ = 111020211119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111020211161) 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, 803506 + ... + 931483.

It is an arithmetic number, because the mean of its divisors is an integer number (14118481125).

Almost surely, 2^111020211121 is an apocalyptic number.

It is an amenable number.

111020211121 is a deficient number, since it is larger than the sum of its proper divisors (1927637879).

111020211121 is a wasteful number, since it uses less digits than its factorization.

111020211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736099.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111020211121 its reverse (121112020111), we get a palindrome (232132231232).

The spelling of 111020211121 in words is "one hundred eleven billion, twenty million, two hundred eleven thousand, one hundred twenty-one".