21220011222201 has 32 divisors (see below), whose sum is σ = 34296428298240. Its totient is φ = 12860065112400.

The previous prime is 21220011222191. The next prime is 21220011222211. The reversal of 21220011222201 is 10222211002212.

It is a happy number.

21220011222201 is a `hidden beast` number, since 21 + 220 + 0 + 1 + 1 + 222 + 201 = 666.

It is an interprime number because it is at equal distance from previous prime (21220011222191) and next prime (21220011222211).

It is not a de Polignac number, because 21220011222201 - 2⁷ = 21220011222073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220011222211) 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 in 31 ways as a sum of consecutive naturals, for example, 5518216 + ... + 8537606.

It is an arithmetic number, because the mean of its divisors is an integer number (1071763384320).

Almost surely, 2^{21220011222201} is an apocalyptic number.

It is an amenable number.

21220011222201 is a deficient number, since it is larger than the sum of its proper divisors (13076417076039).

21220011222201 is a wasteful number, since it uses less digits than its factorization.

21220011222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3043074 (or 3043068 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21220011222201 its reverse (10222211002212), we get a palindrome (31442222224413).

The spelling of 21220011222201 in words is "twenty-one trillion, two hundred twenty billion, eleven million, two hundred twenty-two thousand, two hundred one".