2120021011 has 8 divisors (see below), whose sum is σ = 2154859200. Its totient is φ = 2085383040.

The previous prime is 2120021003. The next prime is 2120021053. The reversal of 2120021011 is 1101200212.

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 2120021011 - 2³ = 2120021003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120021081) 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, 28630 + ... + 71131.

It is an arithmetic number, because the mean of its divisors is an integer number (269357400).

Almost surely, 2^2120021011 is an apocalyptic number.

2120021011 is a deficient number, since it is larger than the sum of its proper divisors (34838189).

2120021011 is an equidigital number, since it uses as much as digits as its factorization.

2120021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100109.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2120021011 is about 46043.6858971998. The cubic root of 2120021011 is about 1284.6359016286.

Adding to 2120021011 its reverse (1101200212), we get a palindrome (3221221223).

The spelling of 2120021011 in words is "two billion, one hundred twenty million, twenty-one thousand, eleven".