22211330021 has 4 divisors (see below), whose sum is σ = 22360399500. Its totient is φ = 22062260544.

The previous prime is 22211330017. The next prime is 22211330041. The reversal of 22211330021 is 12003311222.

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 3273441796 + 18937888225 = 57214^2 + 137615^2 .

It is a cyclic number.

It is not a de Polignac number, because 22211330021 - 2² = 22211330017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211330041) 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, 74534516 + ... + 74534813.

It is an arithmetic number, because the mean of its divisors is an integer number (5590099875).

Almost surely, 2^22211330021 is an apocalyptic number.

It is an amenable number.

22211330021 is a deficient number, since it is larger than the sum of its proper divisors (149069479).

22211330021 is a wasteful number, since it uses less digits than its factorization.

22211330021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149069478.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 22211330021 its reverse (12003311222), we get a palindrome (34214641243).

The spelling of 22211330021 in words is "twenty-two billion, two hundred eleven million, three hundred thirty thousand, twenty-one".