21011202022201 has 2 divisors, whose sum is σ = 21011202022202. Its totient is φ = 21011202022200.

The previous prime is 21011202022147. The next prime is 21011202022211. The reversal of 21011202022201 is 10222020211012.

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., 20133886926400 + 877315095801 = 4487080^2 + 936651^2 .

It is a cyclic number.

It is not a de Polignac number, because 21011202022201 - 2¹⁷ = 21011201891129 is a prime.

It is a super-2 number, since 2×21011202022201² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21011202022211) 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, 10505601011100 + 10505601011101.

It is an arithmetic number, because the mean of its divisors is an integer number (10505601011101).

Almost surely, 2^{21011202022201} is an apocalyptic number.

It is an amenable number.

21011202022201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011202022201 is an equidigital number, since it uses as much as digits as its factorization.

21011202022201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21011202022201 its reverse (10222020211012), we get a palindrome (31233222233213).

The spelling of 21011202022201 in words is "twenty-one trillion, eleven billion, two hundred two million, twenty-two thousand, two hundred one".