22220220021 has 8 divisors (see below), whose sum is σ = 30582668544. Its totient is φ = 14335625760.

The previous prime is 22220219963. The next prime is 22220220037. The reversal of 22220220021 is 12002202222.

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

It is not a de Polignac number, because 22220220021 - 2⁷ = 22220219893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220220091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119463456 + ... + 119463641.

It is an arithmetic number, because the mean of its divisors is an integer number (3822833568).

Almost surely, 2^22220220021 is an apocalyptic number.

It is an amenable number.

22220220021 is a deficient number, since it is larger than the sum of its proper divisors (8362448523).

22220220021 is a wasteful number, since it uses less digits than its factorization.

22220220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238927131.

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 22220220021 its reverse (12002202222), we get a palindrome (34222422243).

The spelling of 22220220021 in words is "twenty-two billion, two hundred twenty million, two hundred twenty thousand, twenty-one".