2011002121 has 4 divisors (see below), whose sum is σ = 2011285012. Its totient is φ = 2010719232.

The previous prime is 2011002109. The next prime is 2011002239. The reversal of 2011002121 is 1212001102.

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 573075721 + 1437926400 = 23939^2 + 37920^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011002121 - 2⁵ = 2011002089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011002098 and 2011002107.

It is not an unprimeable number, because it can be changed into a prime (2011002101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130500 + ... + 145093.

It is an arithmetic number, because the mean of its divisors is an integer number (502821253).

Almost surely, 2^2011002121 is an apocalyptic number.

It is an amenable number.

2011002121 is a deficient number, since it is larger than the sum of its proper divisors (282891).

2011002121 is an equidigital number, since it uses as much as digits as its factorization.

2011002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282890.

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

The square root of 2011002121 is about 44844.1982981076. The cubic root of 2011002121 is about 1262.2271270669.

Adding to 2011002121 its reverse (1212001102), we get a palindrome (3223003223).

The spelling of 2011002121 in words is "two billion, eleven million, two thousand, one hundred twenty-one".