201221000002101 has 16 divisors (see below), whose sum is σ = 284476865169600. Its totient is φ = 126159305413248.

The previous prime is 201221000002091. The next prime is 201221000002103. The reversal of 201221000002101 is 101200000122102.

It is not a de Polignac number, because 201221000002101 - 2¹⁵ = 201220999969333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221000002103) 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, 12883908186 + ... + 12883923803.

It is an arithmetic number, because the mean of its divisors is an integer number (17779804073100).

Almost surely, 2^{201221000002101} is an apocalyptic number.

It is an amenable number.

201221000002101 is a deficient number, since it is larger than the sum of its proper divisors (83255865167499).

201221000002101 is a wasteful number, since it uses less digits than its factorization.

201221000002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25767832148.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 201221000002101 its reverse (101200000122102), we get a palindrome (302421000124203).

The spelling of 201221000002101 in words is "two hundred one trillion, two hundred twenty-one billion, two thousand, one hundred one".