1021211011 has 2 divisors, whose sum is σ = 1021211012. Its totient is φ = 1021211010.

The previous prime is 1021211003. The next prime is 1021211033. The reversal of 1021211011 is 1101121201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021211011 - 2³ = 1021211003 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021211311) 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, 510605505 + 510605506.

It is an arithmetic number, because the mean of its divisors is an integer number (510605506).

Almost surely, 2^1021211011 is an apocalyptic number.

1021211011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021211011 is an equidigital number, since it uses as much as digits as its factorization.

1021211011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1021211011 is about 31956.3923339291. The cubic root of 1021211011 is about 1007.0209282053.

Adding to 1021211011 its reverse (1101121201), we get a palindrome (2122332212).

The spelling of 1021211011 in words is "one billion, twenty-one million, two hundred eleven thousand, eleven".