210221221001 has 16 divisors (see below), whose sum is σ = 239323189248. Its totient is φ = 182785798800.

The previous prime is 210221220997. The next prime is 210221221027. The reversal of 210221221001 is 100122122012.

It is not a de Polignac number, because 210221221001 - 2² = 210221220997 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (210221221031) 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, 3866930 + ... + 3920916.

It is an arithmetic number, because the mean of its divisors is an integer number (14957699328).

Almost surely, 2^210221221001 is an apocalyptic number.

It is an amenable number.

210221221001 is a deficient number, since it is larger than the sum of its proper divisors (29101968247).

210221221001 is a wasteful number, since it uses less digits than its factorization.

210221221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69412.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 210221221001 its reverse (100122122012), we get a palindrome (310343343013).

The spelling of 210221221001 in words is "two hundred ten billion, two hundred twenty-one million, two hundred twenty-one thousand, one".