22010012021 has 4 divisors (see below), whose sum is σ = 22015692972. Its totient is φ = 22004331072.

The previous prime is 22010011981. The next prime is 22010012027. The reversal of 22010012021 is 12021001022.

It is a happy number.

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 12052965796 + 9957046225 = 109786^2 + 99785^2 .

It is a cyclic number.

It is not a de Polignac number, because 22010012021 - 2⁶ = 22010011957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22010011993 and 22010012011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22010012027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2834660 + ... + 2842413.

It is an arithmetic number, because the mean of its divisors is an integer number (5503923243).

Almost surely, 2^22010012021 is an apocalyptic number.

It is an amenable number.

22010012021 is a deficient number, since it is larger than the sum of its proper divisors (5680951).

22010012021 is an equidigital number, since it uses as much as digits as its factorization.

22010012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5680950.

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

Adding to 22010012021 its reverse (12021001022), we get a palindrome (34031013043).

It can be divided in two parts, 2201001 and 2021, that added together give a palindrome (2203022).

The spelling of 22010012021 in words is "twenty-two billion, ten million, twelve thousand, twenty-one".