212021133251 has 2 divisors, whose sum is σ = 212021133252. Its totient is φ = 212021133250.

The previous prime is 212021133229. The next prime is 212021133253. The reversal of 212021133251 is 152331120212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212021133251 - 2⁶ = 212021133187 is a prime.

Together with 212021133253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212021133253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010566625 + 106010566626.

It is an arithmetic number, because the mean of its divisors is an integer number (106010566626).

Almost surely, 2^212021133251 is an apocalyptic number.

212021133251 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021133251 is an equidigital number, since it uses as much as digits as its factorization.

212021133251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 212021133251 its reverse (152331120212), we get a palindrome (364352253463).

The spelling of 212021133251 in words is "two hundred twelve billion, twenty-one million, one hundred thirty-three thousand, two hundred fifty-one".