21202221020101 has 32 divisors (see below), whose sum is σ = 24860721859200. Its totient is φ = 17878682465280.

The previous prime is 21202221020089. The next prime is 21202221020119. The reversal of 21202221020101 is 10102012220212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21202221020101 - 2¹⁷ = 21202220889029 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 (21202221020171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2981586 + ... + 7162003.

It is an arithmetic number, because the mean of its divisors is an integer number (776897558100).

Almost surely, 2^{21202221020101} is an apocalyptic number.

It is an amenable number.

21202221020101 is a deficient number, since it is larger than the sum of its proper divisors (3658500839099).

21202221020101 is a wasteful number, since it uses less digits than its factorization.

21202221020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10143829.

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

Adding to 21202221020101 its reverse (10102012220212), we get a palindrome (31304233240313).

The spelling of 21202221020101 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-one million, twenty thousand, one hundred one".