22102021 has 8 divisors (see below), whose sum is σ = 22391424. Its totient is φ = 21814800.

The previous prime is 22102013. The next prime is 22102051. The reversal of 22102021 is 12020122.

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 22102021 - 2³ = 22102013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22101989 and 22102007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29376 + ... + 30118.

It is an arithmetic number, because the mean of its divisors is an integer number (2798928).

Almost surely, 2^22102021 is an apocalyptic number.

It is an amenable number.

22102021 is a deficient number, since it is larger than the sum of its proper divisors (289403).

22102021 is a wasteful number, since it uses less digits than its factorization.

22102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 22102021 is about 4701.2786558552. The cubic root of 22102021 is about 280.6363968599.

Adding to 22102021 its reverse (12020122), we get a palindrome (34122143).

The spelling of 22102021 in words is "twenty-two million, one hundred two thousand, twenty-one".