212211001201021 has 2 divisors, whose sum is σ = 212211001201022. Its totient is φ = 212211001201020.

The previous prime is 212211001200983. The next prime is 212211001201049. The reversal of 212211001201021 is 120102100112212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209128908464100 + 3082092736921 = 14461290^2 + 1755589^2 .

It is a cyclic number.

It is not a de Polignac number, because 212211001201021 - 2³¹ = 212208853717373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212211001200986 and 212211001201004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212211001208021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105500600510 + 106105500600511.

It is an arithmetic number, because the mean of its divisors is an integer number (106105500600511).

Almost surely, 2^{212211001201021} is an apocalyptic number.

It is an amenable number.

212211001201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

212211001201021 is an equidigital number, since it uses as much as digits as its factorization.

212211001201021 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 16.

Adding to 212211001201021 its reverse (120102100112212), we get a palindrome (332313101313233).

The spelling of 212211001201021 in words is "two hundred twelve trillion, two hundred eleven billion, one million, two hundred one thousand, twenty-one".