210001201022221 has 8 divisors (see below), whose sum is σ = 240002549365824. Its totient is φ = 180000146870880.

The previous prime is 210001201022219. The next prime is 210001201022227. The reversal of 210001201022221 is 122220102100012.

It is a happy number.

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

It is not a de Polignac number, because 210001201022221 - 2¹ = 210001201022219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210001201022195 and 210001201022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210001201022227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72016315 + ... + 74875576.

It is an arithmetic number, because the mean of its divisors is an integer number (30000318670728).

Almost surely, 2^{210001201022221} is an apocalyptic number.

It is an amenable number.

210001201022221 is a deficient number, since it is larger than the sum of its proper divisors (30001348343603).

210001201022221 is a wasteful number, since it uses less digits than its factorization.

210001201022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147096131.

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

Adding to 210001201022221 its reverse (122220102100012), we get a palindrome (332221303122233).

The spelling of 210001201022221 in words is "two hundred ten trillion, one billion, two hundred one million, twenty-two thousand, two hundred twenty-one".