21022022 has 8 divisors (see below), whose sum is σ = 36037776. Its totient is φ = 9009432.

The previous prime is 21022021. The next prime is 21022049. The reversal of 21022022 is 22022012.

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

It is a junction number, because it is equal to n+sod(n) for n = 21021994 and 21022012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022021) 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, 750773 + ... + 750800.

It is an arithmetic number, because the mean of its divisors is an integer number (4504722).

Almost surely, 2^21022022 is an apocalyptic number.

21022022 is a deficient number, since it is larger than the sum of its proper divisors (15015754).

21022022 is a wasteful number, since it uses less digits than its factorization.

21022022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501582.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 21022022 is about 4584.9778625420. The cubic root of 21022022 is about 275.9888236740.

Adding to 21022022 its reverse (22022012), we get a palindrome (43044034).

The spelling of 21022022 in words is "twenty-one million, twenty-two thousand, twenty-two".