22210120021 has 8 divisors (see below), whose sum is σ = 22429681560. Its totient is φ = 21990845952.

The previous prime is 22210120019. The next prime is 22210120027. The reversal of 22210120021 is 12002101222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16618819396 + 5591300625 = 128914^2 + 74775^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22210120021 - 2¹ = 22210120019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22210119983 and 22210120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22210120027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85101 + ... + 227293.

It is an arithmetic number, because the mean of its divisors is an integer number (2803710195).

Almost surely, 2^22210120021 is an apocalyptic number.

It is an amenable number.

22210120021 is a deficient number, since it is larger than the sum of its proper divisors (219561539).

22210120021 is a wasteful number, since it uses less digits than its factorization.

22210120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143735.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22210120021 its reverse (12002101222), we get a palindrome (34212221243).

The spelling of 22210120021 in words is "twenty-two billion, two hundred ten million, one hundred twenty thousand, twenty-one".