2021212541 has 2 divisors, whose sum is σ = 2021212542. Its totient is φ = 2021212540.

The previous prime is 2021212477. The next prime is 2021212577. The reversal of 2021212541 is 1452121202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1886164900 + 135047641 = 43430^2 + 11621^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021212541 - 2⁶ = 2021212477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021212241) 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 as a sum of consecutive naturals, namely, 1010606270 + 1010606271.

It is an arithmetic number, because the mean of its divisors is an integer number (1010606271).

Almost surely, 2^2021212541 is an apocalyptic number.

It is an amenable number.

2021212541 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021212541 is an equidigital number, since it uses as much as digits as its factorization.

2021212541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2021212541 is about 44957.8974263699. The cubic root of 2021212541 is about 1264.3597484955.

Adding to 2021212541 its reverse (1452121202), we get a palindrome (3473333743).

The spelling of 2021212541 in words is "two billion, twenty-one million, two hundred twelve thousand, five hundred forty-one".