22210202021 has 6 divisors (see below), whose sum is σ = 25836357510. Its totient is φ = 19037315976.

The previous prime is 22210202009. The next prime is 22210202029. The reversal of 22210202021 is 12020201222.

It can be written as a sum of positive squares in only one way, i.e., 22209940900 + 261121 = 149030^2 + 511^2 .

It is not a de Polignac number, because 22210202021 - 2¹⁸ = 22209939877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22210201987 and 22210202005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22210202029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 226634666 + ... + 226634763.

It is an arithmetic number, because the mean of its divisors is an integer number (4306059585).

Almost surely, 2^22210202021 is an apocalyptic number.

It is an amenable number.

22210202021 is a deficient number, since it is larger than the sum of its proper divisors (3626155489).

22210202021 is an equidigital number, since it uses as much as digits as its factorization.

22210202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453269443 (or 453269436 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22210202021 its reverse (12020201222), we get a palindrome (34230403243).

The spelling of 22210202021 in words is "twenty-two billion, two hundred ten million, two hundred two thousand, twenty-one".