211222200021001 has 16 divisors (see below), whose sum is σ = 241707773251728. Its totient is φ = 182852216064000.

The previous prime is 211222200020981. The next prime is 211222200021013. The reversal of 211222200021001 is 100120002222112.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 85345779600 + 211136854241401 = 292140^2 + 14530549^2 .

It is a cyclic number.

It is not a de Polignac number, because 211222200021001 - 2¹⁹ = 211222199496713 is a prime.

It is a super-2 number, since 2×211222200021001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211222200061001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1700572350 + ... + 1700696551.

It is an arithmetic number, because the mean of its divisors is an integer number (15106735828233).

Almost surely, 2^{211222200021001} is an apocalyptic number.

It is an amenable number.

211222200021001 is a deficient number, since it is larger than the sum of its proper divisors (30485573230727).

211222200021001 is a wasteful number, since it uses less digits than its factorization.

211222200021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3401269212.

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

Adding to 211222200021001 its reverse (100120002222112), we get a palindrome (311342202243113).

The spelling of 211222200021001 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred million, twenty-one thousand, one".