2011110121 has 4 divisors (see below), whose sum is σ = 2012192644. Its totient is φ = 2010027600.

The previous prime is 2011110109. The next prime is 2011110139. The reversal of 2011110121 is 1210111102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98010000 + 1913100121 = 9900^2 + 43739^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011110121 - 2⁷ = 2011109993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011110098 and 2011110107.

It is not an unprimeable number, because it can be changed into a prime (2011110181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 538470 + ... + 542191.

It is an arithmetic number, because the mean of its divisors is an integer number (503048161).

Almost surely, 2^2011110121 is an apocalyptic number.

It is an amenable number.

2011110121 is a deficient number, since it is larger than the sum of its proper divisors (1082523).

2011110121 is a wasteful number, since it uses less digits than its factorization.

2011110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082522.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 2011110121 is about 44845.4024510874. The cubic root of 2011110121 is about 1262.2497224499.

Adding to 2011110121 its reverse (1210111102), we get a palindrome (3221221223).

The spelling of 2011110121 in words is "two billion, eleven million, one hundred ten thousand, one hundred twenty-one".