22130021 has 8 divisors (see below), whose sum is σ = 22450944. Its totient is φ = 21811680.

The previous prime is 22129999. The next prime is 22130029. The reversal of 22130021 is 12003122.

It is a happy number.

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 22130021 - 2⁶ = 22129957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22129984 and 22130011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22130029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21836 + ... + 22826.

It is an arithmetic number, because the mean of its divisors is an integer number (2806368).

Almost surely, 2^22130021 is an apocalyptic number.

It is an amenable number.

22130021 is a deficient number, since it is larger than the sum of its proper divisors (320923).

22130021 is a wasteful number, since it uses less digits than its factorization.

22130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 22130021 is about 4704.2556265577. The cubic root of 22130021 is about 280.7548551555.

Adding to 22130021 its reverse (12003122), we get a palindrome (34133143).

The spelling of 22130021 in words is "twenty-two million, one hundred thirty thousand, twenty-one".