2121002011 has 2 divisors, whose sum is σ = 2121002012. Its totient is φ = 2121002010.

The previous prime is 2121001997. The next prime is 2121002027. The reversal of 2121002011 is 1102001212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121002011 - 2⁵ = 2121001979 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121005011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060501005 + 1060501006.

It is an arithmetic number, because the mean of its divisors is an integer number (1060501006).

Almost surely, 2^2121002011 is an apocalyptic number.

2121002011 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121002011 is an equidigital number, since it uses as much as digits as its factorization.

2121002011 is an evil number, because the sum of its binary digits is even.

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

The square root of 2121002011 is about 46054.3375915885. The cubic root of 2121002011 is about 1284.8340181379.

Adding to 2121002011 its reverse (1102001212), we get a palindrome (3223003223).

The spelling of 2121002011 in words is "two billion, one hundred twenty-one million, two thousand, eleven".