2011021213 has 2 divisors, whose sum is σ = 2011021214. Its totient is φ = 2011021212.

The previous prime is 2011021189. The next prime is 2011021223. The reversal of 2011021213 is 3121201102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1404975289 + 606045924 = 37483^2 + 24618^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011021213 - 2⁹ = 2011020701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011021193 and 2011021202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011021223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005510606 + 1005510607.

It is an arithmetic number, because the mean of its divisors is an integer number (1005510607).

Almost surely, 2^2011021213 is an apocalyptic number.

It is an amenable number.

2011021213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011021213 is an equidigital number, since it uses as much as digits as its factorization.

2011021213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2011021213 is about 44844.4111679482. The cubic root of 2011021213 is about 1262.2311214874.

Adding to 2011021213 its reverse (3121201102), we get a palindrome (5132222315).

The spelling of 2011021213 in words is "two billion, eleven million, twenty-one thousand, two hundred thirteen".