21220001022201 has 8 divisors (see below), whose sum is σ = 28293824355360. Its totient is φ = 14146422518592.

The previous prime is 21220001022193. The next prime is 21220001022203. The reversal of 21220001022201 is 10222010002212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21220001022201 - 2³ = 21220001022193 is a prime.

It is a super-2 number, since 2×21220001022201² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21220001022203) 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 7 ways as a sum of consecutive naturals, for example, 61005055 + ... + 61351908.

It is an arithmetic number, because the mean of its divisors is an integer number (3536728044420).

Almost surely, 2^{21220001022201} is an apocalyptic number.

It is an amenable number.

21220001022201 is a deficient number, since it is larger than the sum of its proper divisors (7073823333159).

21220001022201 is a wasteful number, since it uses less digits than its factorization.

21220001022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122414775.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21220001022201 its reverse (10222010002212), we get a palindrome (31442011024413).

The spelling of 21220001022201 in words is "twenty-one trillion, two hundred twenty billion, one million, twenty-two thousand, two hundred one".