21202221002101 has 16 divisors (see below), whose sum is σ = 22035125952000. Its totient is φ = 20378652148800.

The previous prime is 21202221002063. The next prime is 21202221002107. The reversal of 21202221002101 is 10120012220212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21202221002101 - 2¹³ = 21202220993909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202221002107) 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, 50094795 + ... + 50516263.

It is an arithmetic number, because the mean of its divisors is an integer number (1377195372000).

Almost surely, 2^{21202221002101} is an apocalyptic number.

It is an amenable number.

21202221002101 is a deficient number, since it is larger than the sum of its proper divisors (832904949899).

21202221002101 is a wasteful number, since it uses less digits than its factorization.

21202221002101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432540.

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

Adding to 21202221002101 its reverse (10120012220212), we get a palindrome (31322233222313).

The spelling of 21202221002101 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-one million, two thousand, one hundred one".