22010210021 has 4 divisors (see below), whose sum is σ = 22059894912. Its totient is φ = 21960525132.

The previous prime is 22010210009. The next prime is 22010210039. The reversal of 22010210021 is 12001201022.

It is a happy number.

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 22010210021 - 2¹⁴ = 22010193637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22010209984 and 22010210011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22010210041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24841781 + ... + 24842666.

It is an arithmetic number, because the mean of its divisors is an integer number (5514973728).

Almost surely, 2^22010210021 is an apocalyptic number.

It is an amenable number.

22010210021 is a deficient number, since it is larger than the sum of its proper divisors (49684891).

22010210021 is an equidigital number, since it uses as much as digits as its factorization.

22010210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49684890.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22010210021 its reverse (12001201022), we get a palindrome (34011411043).

The spelling of 22010210021 in words is "twenty-two billion, ten million, two hundred ten thousand, twenty-one".