2112021011 has 4 divisors (see below), whose sum is σ = 2112169224. Its totient is φ = 2111872800.

The previous prime is 2112021001. The next prime is 2112021031. The reversal of 2112021011 is 1101202112.

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

It is a cyclic number.

It is not a de Polignac number, because 2112021011 - 2⁶ = 2112020947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2112020983 and 2112021001.

It is not an unprimeable number, because it can be changed into a prime (2112021001) 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 3 ways as a sum of consecutive naturals, for example, 50150 + ... + 82091.

It is an arithmetic number, because the mean of its divisors is an integer number (528042306).

Almost surely, 2^2112021011 is an apocalyptic number.

2112021011 is a deficient number, since it is larger than the sum of its proper divisors (148213).

2112021011 is a wasteful number, since it uses less digits than its factorization.

2112021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148212.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2112021011 is about 45956.7297683375. The cubic root of 2112021011 is about 1283.0179866246.

Adding to 2112021011 its reverse (1101202112), we get a palindrome (3213223123).

The spelling of 2112021011 in words is "two billion, one hundred twelve million, twenty-one thousand, eleven".