22211021 has 8 divisors (see below), whose sum is σ = 25413504. Its totient is φ = 19015920.

The previous prime is 22211009. The next prime is 22211041. The reversal of 22211021 is 12011222.

It is a happy number.

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

It is not a de Polignac number, because 22211021 - 2⁶ = 22210957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22210993 and 22211011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8456 + ... + 10766.

It is an arithmetic number, because the mean of its divisors is an integer number (3176688).

Almost surely, 2^22211021 is an apocalyptic number.

It is an amenable number.

22211021 is a deficient number, since it is larger than the sum of its proper divisors (3202483).

22211021 is a wasteful number, since it uses less digits than its factorization.

22211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3691.

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

The square root of 22211021 is about 4712.8569891309. The cubic root of 22211021 is about 281.0969764447.

Adding to 22211021 its reverse (12011222), we get a palindrome (34222243).

The spelling of 22211021 in words is "twenty-two million, two hundred eleven thousand, twenty-one".