2102221012201 has 4 divisors (see below), whose sum is σ = 2102232633732. Its totient is φ = 2102209390672.

The previous prime is 2102221012189. The next prime is 2102221012219. The reversal of 2102221012201 is 1022101222012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1594171386025 + 508049626176 = 1262605^2 + 712776^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102221012201 - 2⁵ = 2102221012169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102221015201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5535070 + ... + 5902663.

It is an arithmetic number, because the mean of its divisors is an integer number (525558158433).

Almost surely, 2^{2102221012201} is an apocalyptic number.

It is an amenable number.

2102221012201 is a deficient number, since it is larger than the sum of its proper divisors (11621531).

2102221012201 is a wasteful number, since it uses less digits than its factorization.

2102221012201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11621530.

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

Adding to 2102221012201 its reverse (1022101222012), we get a palindrome (3124322234213).

The spelling of 2102221012201 in words is "two trillion, one hundred two billion, two hundred twenty-one million, twelve thousand, two hundred one".