2011101121 has 4 divisors (see below), whose sum is σ = 2029551700. Its totient is φ = 1992650544.

The previous prime is 2011101119. The next prime is 2011101137. The reversal of 2011101121 is 1211011102.

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 710489025 + 1300612096 = 26655^2 + 36064^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011101121 - 2¹ = 2011101119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011101098 and 2011101107.

It is not an unprimeable number, because it can be changed into a prime (2011101101) 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, 9225126 + ... + 9225343.

It is an arithmetic number, because the mean of its divisors is an integer number (507387925).

Almost surely, 2^2011101121 is an apocalyptic number.

It is an amenable number.

2011101121 is a deficient number, since it is larger than the sum of its proper divisors (18450579).

2011101121 is a wasteful number, since it uses less digits than its factorization.

2011101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18450578.

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

The square root of 2011101121 is about 44845.3021062407. The cubic root of 2011101121 is about 1262.2478395322.

Adding to 2011101121 its reverse (1211011102), we get a palindrome (3222112223).

The spelling of 2011101121 in words is "two billion, eleven million, one hundred one thousand, one hundred twenty-one".