21202222112101 has 4 divisors (see below), whose sum is σ = 21271284725152. Its totient is φ = 21133159499052.

The previous prime is 21202222112083. The next prime is 21202222112219. The reversal of 21202222112101 is 10121122220212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21202222112101 - 2²⁹ = 21201685241189 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 (21202222172101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34531306065 + ... + 34531306678.

It is an arithmetic number, because the mean of its divisors is an integer number (5317821181288).

Almost surely, 2^{21202222112101} is an apocalyptic number.

It is an amenable number.

21202222112101 is a deficient number, since it is larger than the sum of its proper divisors (69062613051).

21202222112101 is an equidigital number, since it uses as much as digits as its factorization.

21202222112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69062613050.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21202222112101 its reverse (10121122220212), we get a palindrome (31323344332313).

The spelling of 21202222112101 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-two million, one hundred twelve thousand, one hundred one".