21012222022201 has 2 divisors, whose sum is σ = 21012222022202. Its totient is φ = 21012222022200.

The previous prime is 21012222022109. The next prime is 21012222022223. The reversal of 21012222022201 is 10222022221012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15521748255225 + 5490473766976 = 3939765^2 + 2343176^2 .

It is a cyclic number.

It is not a de Polignac number, because 21012222022201 - 2¹³ = 21012222014009 is a prime.

It is not a weakly prime, because it can be changed into another prime (21012222022801) 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, 10506111011100 + 10506111011101.

It is an arithmetic number, because the mean of its divisors is an integer number (10506111011101).

Almost surely, 2^{21012222022201} is an apocalyptic number.

It is an amenable number.

21012222022201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012222022201 is an equidigital number, since it uses as much as digits as its factorization.

21012222022201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21012222022201 its reverse (10222022221012), we get a palindrome (31234244243213).

The spelling of 21012222022201 in words is "twenty-one trillion, twelve billion, two hundred twenty-two million, twenty-two thousand, two hundred one".