2121011011 has 12 divisors (see below), whose sum is σ = 2469283320. Its totient is φ = 1816547040.

The previous prime is 2121010973. The next prime is 2121011071. The reversal of 2121011011 is 1101101212.

It is not a de Polignac number, because 2121011011 - 2⁹ = 2121010499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121011071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46495 + ... + 80023.

It is an arithmetic number, because the mean of its divisors is an integer number (205773610).

Almost surely, 2^2121011011 is an apocalyptic number.

2121011011 is a deficient number, since it is larger than the sum of its proper divisors (348272309).

2121011011 is a wasteful number, since it uses less digits than its factorization.

2121011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34834 (or 34827 counting only the distinct ones).

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

The square root of 2121011011 is about 46054.4353021509. The cubic root of 2121011011 is about 1284.8358354378.

Adding to 2121011011 its reverse (1101101212), we get a palindrome (3222112223).

The spelling of 2121011011 in words is "two billion, one hundred twenty-one million, eleven thousand, eleven".