21022202022109 has 4 divisors (see below), whose sum is σ = 21156101398204. Its totient is φ = 20888302646016.

The previous prime is 21022202022079. The next prime is 21022202022127. The reversal of 21022202022109 is 90122020222012.

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 10469592705625 + 10552609316484 = 3235675^2 + 3248478^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022202022109 - 2¹⁷ = 21022201891037 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 (21022202052109) 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, 66949687812 + ... + 66949688125.

It is an arithmetic number, because the mean of its divisors is an integer number (5289025349551).

Almost surely, 2^{21022202022109} is an apocalyptic number.

It is an amenable number.

21022202022109 is a deficient number, since it is larger than the sum of its proper divisors (133899376095).

21022202022109 is a wasteful number, since it uses less digits than its factorization.

21022202022109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133899376094.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 21022202022109 in words is "twenty-one trillion, twenty-two billion, two hundred two million, twenty-two thousand, one hundred nine".