212021022001 has 2 divisors, whose sum is σ = 212021022002. Its totient is φ = 212021022000.

The previous prime is 212021021951. The next prime is 212021022023. The reversal of 212021022001 is 100220120212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145407992976 + 66613029025 = 381324^2 + 258095^2 .

It is a cyclic number.

It is not a de Polignac number, because 212021022001 - 2¹¹ = 212021019953 is a prime.

It is not a weakly prime, because it can be changed into another prime (212021028001) 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, 106010511000 + 106010511001.

It is an arithmetic number, because the mean of its divisors is an integer number (106010511001).

Almost surely, 2^212021022001 is an apocalyptic number.

It is an amenable number.

212021022001 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021022001 is an equidigital number, since it uses as much as digits as its factorization.

212021022001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 212021022001 its reverse (100220120212), we get a palindrome (312241142213).

The spelling of 212021022001 in words is "two hundred twelve billion, twenty-one million, twenty-two thousand, one".