211012012021 has 2 divisors, whose sum is σ = 211012012022. Its totient is φ = 211012012020.

The previous prime is 211012011997. The next prime is 211012012037. The reversal of 211012012021 is 120210210112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209685231396 + 1326780625 = 457914^2 + 36425^2 .

It is a cyclic number.

It is not a de Polignac number, because 211012012021 - 2¹⁵ = 211011979253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211012011992 and 211012012010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211012012051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105506006010 + 105506006011.

It is an arithmetic number, because the mean of its divisors is an integer number (105506006011).

Almost surely, 2^211012012021 is an apocalyptic number.

It is an amenable number.

211012012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

211012012021 is an equidigital number, since it uses as much as digits as its factorization.

211012012021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211012012021 its reverse (120210210112), we get a palindrome (331222222133).

The spelling of 211012012021 in words is "two hundred eleven billion, twelve million, twelve thousand, twenty-one".